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WANGS ALLIANCE CORPORATION

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  • Port Washington, NY, US
Organizations

Patents Grantslast 30 patents

  • Information Patent Grant

    Lighting fixture
    • Patent number D1062001
    • Issue date Feb 11, 2025
    • WANGS ALLIANCE CORPORATION
    • Emanuel Valera Reyes
    • D26 - Lighting
  • Information Patent Grant

    Connectable lamp
    • Patent number 12,209,740
    • Issue date Jan 28, 2025
    • WANGS ALLIANCE CORPORATION
    • David Xin Wang
    • F21 - LIGHTING
  • Information Patent Grant

    Multiplexed segmented lighting lamina
    • Patent number 12,207,369
    • Issue date Jan 21, 2025
    • Wangs Alliance Corporation
    • Voravit Puvanakijjakorn
    • F21 - LIGHTING
  • Information Patent Grant

    Suspended LED fixtures having adjustable cord support
    • Patent number 12,163,649
    • Issue date Dec 10, 2024
    • WANGS ALLIANCE CORPORATION
    • Dimauro Andrade Edwards
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Dynamic dim-to-warm with color-tunable fixtures
    • Patent number 12,156,315
    • Issue date Nov 26, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Caged glass fixture
    • Patent number 12,140,300
    • Issue date Nov 12, 2024
    • WANGS ALLIANCE CORPORATION
    • Roslyn Yando
    • F21 - LIGHTING
  • Information Patent Grant

    Connectable lamp
    • Patent number 12,129,998
    • Issue date Oct 29, 2024
    • WANGS ALLIANCE CORPORATION
    • David Xin Wang
    • F21 - LIGHTING
  • Information Patent Grant

    Fan with a translucent blade support
    • Patent number 12,117,011
    • Issue date Oct 15, 2024
    • WANGS ALLIANCE CORPORATION
    • Mark Gajewski
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Enhanced lighting
    • Patent number 12,117,158
    • Issue date Oct 15, 2024
    • WANGS ALLIANCE CORPORATION
    • Shelley S. Wald
    • F21 - LIGHTING
  • Information Patent Grant

    Methods and apparatus for controlling fan devices
    • Patent number 12,117,013
    • Issue date Oct 15, 2024
    • WANGS ALLIANCE CORPORATION
    • Eric Stefankiewicz
    • G08 - SIGNALLING
  • Information Patent Grant

    Germicidal lighting
    • Patent number 12,109,338
    • Issue date Oct 8, 2024
    • WANGS ALLIANCE CORPORATION
    • Shelley S. Wald
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Small aperture light emitting diode LED lighting
    • Patent number 12,111,040
    • Issue date Oct 8, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • F21 - LIGHTING
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 12,104,773
    • Issue date Oct 1, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Fan with a translucent blade support
    • Patent number 12,104,607
    • Issue date Oct 1, 2024
    • WANGS ALLIANCE CORPORATION
    • Mark Gajewski
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Small aperture light emitting diode (“LED”) lighting
    • Patent number 12,104,771
    • Issue date Oct 1, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • F21 - LIGHTING
  • Information Patent Grant

    Dim-to-warm lighting
    • Patent number 12,101,858
    • Issue date Sep 24, 2024
    • WANGS ALLIANCE CORPORATION
    • Voravit Puvanakijjakorn
    • F21 - LIGHTING
  • Information Patent Grant

    Lighting fixture
    • Patent number D1044086
    • Issue date Sep 24, 2024
    • WANGS ALLIANCE CORPORATION
    • Daniel A Montecino
    • D26 - Lighting
  • Information Patent Grant

    Power supply
    • Patent number 12,101,855
    • Issue date Sep 24, 2024
    • WANGS ALLIANCE CORPORATION
    • Voravit Puvanakijjakorn
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Lighting fixture
    • Patent number D1044092
    • Issue date Sep 24, 2024
    • WANGS ALLIANCE CORPORATION
    • Molly E. McGee
    • D26 - Lighting
  • Information Patent Grant

    Enhanced lighting
    • Patent number 12,078,337
    • Issue date Sep 3, 2024
    • WANGS ALLIANCE CORPORATION
    • Shelley S. Wald
    • F21 - LIGHTING
  • Information Patent Grant

    Crosstalk mitigation for lighting control
    • Patent number 12,075,545
    • Issue date Aug 27, 2024
    • WANGS ALLIANCE CORPORATION
    • Michael Sabolcik
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 12,055,287
    • Issue date Aug 6, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 12,025,296
    • Issue date Jul 2, 2024
    • WANGS ALLIANCE CORPORATION
    • Voravit Puvanakijjakorn
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 12,007,104
    • Issue date Jun 11, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 12,000,574
    • Issue date Jun 4, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 11,994,274
    • Issue date May 28, 2024
    • WANGS ALLIANCE CORPORATION
    • Peter Vancorenland
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 11,988,366
    • Issue date May 21, 2024
    • WANGS ALLIANCE CORPORATION
    • Jonathan Ian Hoffman
    • F21 - LIGHTING
  • Information Patent Grant

    Modular articulating lighting
    • Patent number 11,982,430
    • Issue date May 14, 2024
    • WANGS ALLIANCE CORPORATION
    • Wai Ho Choy
    • F21 - LIGHTING
  • Information Patent Grant

    LED lighting methods and apparatus
    • Patent number 11,940,135
    • Issue date Mar 26, 2024
    • WANGS ALLIANCE CORPORATION
    • Basar Erdener
    • F21 - LIGHTING
  • Information Patent Grant

    Fixtures, power and control systems for same
    • Patent number 11,920,767
    • Issue date Mar 5, 2024
    • WANGS ALLIANCE CORPORATION
    • Voravit Puvanakijjakorn
    • B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

  • Information Patent Application

    DIGITAL TO ANALOG DIMMING CONTROL
    • Publication number 20250040006
    • Publication date Jan 30, 2025
    • Wangs Alliance Corporation
    • Voravit Puvanakijjakorn
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    OFF-FIXTURE LIGHTING CONTROL CIRCUIT
    • Publication number 20250040013
    • Publication date Jan 30, 2025
    • Wangs Alliance Corporation
    • Voravit Puvanakijjakorn
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    MODULAR EMERGENCY BATTERY
    • Publication number 20250038568
    • Publication date Jan 30, 2025
    • Wangs Alliance Corporation
    • Dimauro Andrade Edwards
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    CONNECTABLE LAMP
    • Publication number 20250035296
    • Publication date Jan 30, 2025
    • Wangs Alliance Corporation
    • David Xin Wang
    • F21 - LIGHTING
  • Information Patent Application

    LOW GLARE FIXTURE
    • Publication number 20250027639
    • Publication date Jan 23, 2025
    • Wangs Alliance Corporation
    • Dunping Hu
    • F21 - LIGHTING
  • Information Patent Application

    SMALL APERTURE LIGHT EMITTING DIODE LED LIGHTING
    • Publication number 20250012430
    • Publication date Jan 9, 2025
    • Wangs Alliance Corporation
    • Jonathan Ian Hoffman
    • F21 - LIGHTING
  • Information Patent Application

    CROSSTALK MITIGATION FOR LIGHTING CONTROL
    • Publication number 20250008630
    • Publication date Jan 2, 2025
    • Wangs Alliance Corporation
    • Michael Sabolcik
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    MODULAR ARTICULATING LIGHTING
    • Publication number 20240344688
    • Publication date Oct 17, 2024
    • Wangs Alliance Corporation
    • Wai Ho Choy
    • F21 - LIGHTING
  • Information Patent Application

    ENHANCED LIGHTING
    • Publication number 20240310024
    • Publication date Sep 19, 2024
    • Wangs Alliance Corporation
    • Shelley S. Wald
    • F21 - LIGHTING
  • Information Patent Application

    FAN WITH A TRANSLUCENT BLADE SUPPORT
    • Publication number 20240271630
    • Publication date Aug 15, 2024
    • Wangs Alliance Corporation
    • Mark Gajewski
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    FAN WITH A TRANSLUCENT BLADE SUPPORT
    • Publication number 20240271629
    • Publication date Aug 15, 2024
    • Wangs Alliance Corporation
    • Mark Gajewski
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Multiplexed Segmented Lighting Lamina
    • Publication number 20240268008
    • Publication date Aug 8, 2024
    • Wangs Alliance Corporation
    • Voravit Puvanakijjakorn
    • F21 - LIGHTING
  • Information Patent Application

    SMALL APERTURE LIGHT EMITTING DIODE LED LIGHTING
    • Publication number 20240255128
    • Publication date Aug 1, 2024
    • Wangs Alliance Corporation
    • Jonathan Ian Hoffman
    • F21 - LIGHTING
  • Information Patent Application

    LED LIGHTING METHODS AND APPARATUS
    • Publication number 20240255131
    • Publication date Aug 1, 2024
    • Wangs Alliance Corporation
    • Rong Feng Yu
    • F21 - LIGHTING
  • Information Patent Application

    POWER SUPPLY
    • Publication number 20240260150
    • Publication date Aug 1, 2024
    • Wangs Alliance Corporation
    • Voravit Puvanakijjakorn
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    SMALL APERTURE LIGHT EMITTING DIODE (“LED”) LIGHTING
    • Publication number 20240255126
    • Publication date Aug 1, 2024
    • Wangs Alliance Corporation
    • Jonathan Ian Hoffman
    • F21 - LIGHTING
  • Information Patent Application

    Fixtures, Power and Control Systems for Same
    • Publication number 20240230070
    • Publication date Jul 11, 2024
    • Wangs Alliance Corporation
    • Sean Tham
    • B24 - GRINDING POLISHING
  • Information Patent Application

    GERMICIDAL LIGHTING
    • Publication number 20240216564
    • Publication date Jul 4, 2024
    • Wangs Alliance Corporation
    • Shelley S. Wald
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    DYNAMIC DIM-TO-WARM WITH COLOR-TUNABLE FIXTURES
    • Publication number 20240224402
    • Publication date Jul 4, 2024
    • Wangs Alliance Corporation
    • Jonathan Ian Hoffman
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    Fixtures, Power and Control Systems for Same
    • Publication number 20240210017
    • Publication date Jun 27, 2024
    • Wangs Alliance Corporation
    • Sean Tham
    • B24 - GRINDING POLISHING
  • Information Patent Application

    ENHANCED LIGHTING
    • Publication number 20240191863
    • Publication date Jun 13, 2024
    • Wangs Alliance Corporation
    • Shelley S. Wald
    • F21 - LIGHTING
  • Information Patent Application

    Fixtures, Power and Control Systems for Same
    • Publication number 20240183518
    • Publication date Jun 6, 2024
    • Wangs Alliance Corporation
    • Sean Tham
    • B24 - GRINDING POLISHING
  • Information Patent Application

    DIM-TO-WARM LIGHTING
    • Publication number 20240163992
    • Publication date May 16, 2024
    • Wangs Alliance Corporation
    • Voravit Puvanakijjakorn
    • F21 - LIGHTING
  • Information Patent Application

    LED LIGHTING METHODS AND APPARATUS
    • Publication number 20240159384
    • Publication date May 16, 2024
    • WANGS ALLIANCE CORPORATION
    • Basar Erdener
    • F21 - LIGHTING
  • Information Patent Application

    Fixtures, Power and Control Systems for Same
    • Publication number 20240085005
    • Publication date Mar 14, 2024
    • Wangs Alliance Corporation
    • Sean Tham
    • B24 - GRINDING POLISHING
  • Information Patent Application

    MODULAR ARTICULATING LIGHTING
    • Publication number 20240077192
    • Publication date Mar 7, 2024
    • Wangs Alliance Corporation
    • Wai Ho Choy
    • F21 - LIGHTING
  • Information Patent Application

    Fixtures, Power and Control Systems for Same
    • Publication number 20240068648
    • Publication date Feb 29, 2024
    • Wangs Alliance Corporation
    • Sean Tham
    • F21 - LIGHTING
  • Information Patent Application

    Fixtures, Power and Control Systems for Same
    • Publication number 20240044478
    • Publication date Feb 8, 2024
    • Wangs Alliance Corporation
    • Sean Tham
    • B24 - GRINDING POLISHING
  • Information Patent Application

    Fixtures, Power and Control Systems for Same
    • Publication number 20240019110
    • Publication date Jan 18, 2024
    • Wangs Alliance Corporation
    • Sean Tham
    • B24 - GRINDING POLISHING
  • Information Patent Application

    LED LIGHTING METHODS AND APPARATUS
    • Publication number 20230332762
    • Publication date Oct 19, 2023
    • Wangs Alliance Corporation
    • Basar Erdener
    • F21 - LIGHTING

Trademarklast 30 trademarks

  • Information Trademark

    98939007 - WAC GROUP TECHNOLOGY ILLUMINATED
    • Serial number 98939007
    • Filing date Jan 6, 2025
    • WANGS ALLIANCE CORPORATION
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    98938880 - TECHNOLOGY ILLUMINATED
    • Serial number 98938880
    • Filing date Jan 6, 2025
    • WANGS ALLIANCE CORPORATION
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    98856104 - WAC GROUP
    • Serial number 98856104
    • Filing date Nov 15, 2024
    • WANGS ALLIANCE CORPORATION
    • 35 - Advertising
  • Information Trademark

    98818661 - W
    • Serial number 98818661
    • Filing date Oct 24, 2024
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    98711311 - VENTRIX
    • Serial number 98711311
    • Filing date Aug 22, 2024
    • WANGS ALLIANCE CORPORATION
    • 42 - Scientific and technological services and research and design relating thereto
  • Information Trademark

    98690610 - WYNOVIA GROUP
    • Serial number 98690610
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 40 - Treatment of materials
  • Information Trademark

    98690591 - WYNOVIA GROUP
    • Serial number 98690591
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    98690581 - WAC 360
    • Serial number 98690581
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 40 - Treatment of materials
  • Information Trademark

    98690556 - WAC 360
    • Serial number 98690556
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    98690570 - WAC 360
    • Serial number 98690570
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 35 - Advertising
  • Information Trademark

    98690598 - WYNOVIA GROUP
    • Serial number 98690598
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    98690550 - WAC 360
    • Serial number 98690550
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    98690604 - WYNOVIA GROUP
    • Serial number 98690604
    • Filing date Aug 9, 2024
    • WANGS ALLIANCE CORPORATION
    • 35 - Advertising
  • Information Trademark

    98682953 - KENRIC
    • Serial number 98682953
    • Filing date Aug 5, 2024
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    98661682 - TWIST-N-LITE
    • Serial number 98661682
    • Filing date Jul 23, 2024
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    98524114 - BRINGING LIGHT TO LIFE
    • Serial number 98524114
    • Filing date Apr 29, 2024
    • WANGS ALLIANCE CORPORATION
    • 40 - Treatment of materials
  • Information Trademark

    98519288 - LUCIX
    • Serial number 98519288
    • Filing date Apr 25, 2024
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    98519229 - VENTRIX
    • Serial number 98519229
    • Filing date Apr 25, 2024
    • WANGS ALLIANCE CORPORATION
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    98519242 - VENTRIX
    • Serial number 98519242
    • Registration number 7677639
    • Filing date Apr 25, 2024
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    98519257 - VENTRIX
    • Serial number 98519257
    • Filing date Apr 25, 2024
    • WANGS ALLIANCE CORPORATION
    • 6 - Common metals and their alloys
  • Information Trademark

    98421132 - KONSTRUKT
    • Serial number 98421132
    • Filing date Feb 26, 2024
    • Wangs Alliance Corporation d/b/a WAC Lighting
    • 6 - Common metals and their alloys
  • Information Trademark

    97701078 - WAC LANDSCAPE LIGHTING
    • Serial number 97701078
    • Registration number 7260761
    • Filing date Dec 2, 2022
    • Wangs Alliance Corp.
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    97388288 - DESIGN STUDIO LIGHTING
    • Serial number 97388288
    • Filing date Apr 29, 2022
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    97385743 - COLORSCAPING
    • Serial number 97385743
    • Registration number 7116911
    • Filing date Apr 28, 2022
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    97385740 - COLORSCAPES
    • Serial number 97385740
    • Filing date Apr 28, 2022
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    97339552 - AISPIRE LIGHT. EXPERIENCED.
    • Serial number 97339552
    • Registration number 7280391
    • Filing date Mar 30, 2022
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    90867887 - LEDME
    • Serial number 90867887
    • Filing date Aug 5, 2021
    • WANGS ALLIANCE CORPORATION
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    90816035 - STRAIGHT EDGE
    • Serial number 90816035
    • Filing date Jul 7, 2021
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
  • Information Trademark

    90814566 - INVISILED
    • Serial number 90814566
    • Registration number 6824662
    • Filing date Jul 7, 2021
    • WANGS ALLIANCE CORPORATION
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
  • Information Trademark

    90799517 - WAC
    • Serial number 90799517
    • Registration number 6787124
    • Filing date Jun 28, 2021
    • WANGS ALLIANCE CORPORATION
    • 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes