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Richard Chang

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  • Taipei Hsien, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Portable air extracting device
    • Patent number 10,683,115
    • Issue date Jun 16, 2020
    • WELCOME CO., LTD.
    • Richard Chang
    • A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
  • Information Patent Grant

    Sealer
    • Patent number D823913
    • Issue date Jul 24, 2018
    • WELCOME CO., LTD.
    • Ammy Chou
    • D15 - Machines not elsewhere specified
  • Information Patent Grant

    Storage electric sealer
    • Patent number 9,937,661
    • Issue date Apr 10, 2018
    • WELCOME CO., LTD.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Rechargeable sealer with storage function
    • Patent number 9,809,340
    • Issue date Nov 7, 2017
    • WELCOME CO., LTD.
    • Richard Chang
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Hand-held electric sealer with detachable sealing module
    • Patent number 7,939,783
    • Issue date May 10, 2011
    • Richard Chang
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Hand-held electric sealer having a detachable electric sealing module
    • Patent number 7,700,897
    • Issue date Apr 20, 2010
    • Welcome Co., Ltd.
    • Ammy Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electric heat sealer with safety device
    • Patent number 7,315,010
    • Issue date Jan 1, 2008
    • Welcome Co., Ltd.
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Detachable heat sealing apparatus
    • Patent number 7,312,421
    • Issue date Dec 25, 2007
    • Ammy Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Hand-held electric heat sealer
    • Patent number 7,291,810
    • Issue date Nov 6, 2007
    • Welcome Co., Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Hand-held electric heat sealer
    • Patent number 7,034,252
    • Issue date Apr 25, 2006
    • Welcome Co., Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Table-top electric heat sealer
    • Patent number 6,998,577
    • Issue date Feb 14, 2006
    • Welcome Co., Ltd.
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electric heat sealer with safety device
    • Patent number 6,936,790
    • Issue date Aug 30, 2005
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electric heat sealer
    • Patent number 6,919,537
    • Issue date Jul 19, 2005
    • Welcome Co., Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Timer tea maker
    • Patent number D498383
    • Issue date Nov 16, 2004
    • Richard Chang
    • D07 - Equipment for preparing or serving food or drink not elsewhere specified
  • Information Patent Grant

    Tea maker
    • Patent number 6,805,040
    • Issue date Oct 19, 2004
    • Richard Chang
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Timer tea maker
    • Patent number 6,802,246
    • Issue date Oct 12, 2004
    • Richard Chang
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Table-top electric heat sealer
    • Patent number 6,770,849
    • Issue date Aug 3, 2004
    • Welcome Co., Ltd.
    • Shu-Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Hand-held electric heat sealer
    • Patent number 6,630,647
    • Issue date Oct 7, 2003
    • Welcome Co., Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electric heat sealer with safety device
    • Patent number 6,627,853
    • Issue date Sep 30, 2003
    • Welcome Company, Ltd.
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Safety electric sealer having a safety gate
    • Patent number 6,573,477
    • Issue date Jun 3, 2003
    • Welcome Company Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electric heat sealer with offset sealer portion
    • Patent number 6,335,515
    • Issue date Jan 1, 2002
    • Welcome Company, Ltd.
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Hand-held electric sealer with safety means
    • Patent number 6,326,594
    • Issue date Dec 4, 2001
    • Welcome Company, Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Electric heat sealer with safety device
    • Patent number 6,232,579
    • Issue date May 15, 2001
    • Welcome Co., Ltd.
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Hand-held electric sealer with detachable heat resistant cover sheet
    • Patent number 6,064,038
    • Issue date May 16, 2000
    • Welcome Company, Ltd.
    • Ammy Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    PORTABLE AIR EXTRACTING DEVICE
    • Publication number 20190127098
    • Publication date May 2, 2019
    • Welcome Co., Ltd.
    • Richard CHANG
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Application

    ELECTRICAL VACUUM-PUMPING DEVICE
    • Publication number 20170297753
    • Publication date Oct 19, 2017
    • Welcome Co., Ltd.
    • Richard CHANG
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Application

    STORAGE ELECTRIC SEALER
    • Publication number 20160229115
    • Publication date Aug 11, 2016
    • Welcome Co., Ltd.
    • Richard CHANG
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Hand-held electric sealer with detachable sealing module
    • Publication number 20090026190
    • Publication date Jan 29, 2009
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Hand-held electric sealer with dual heads
    • Publication number 20090020230
    • Publication date Jan 22, 2009
    • Richard CHANG
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Hand-held electric sealer having a detachable electric sealing module
    • Publication number 20060231211
    • Publication date Oct 19, 2006
    • Welcome Co., Ltd.
    • Ammy Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Hand-held electric heat sealer
    • Publication number 20060163237
    • Publication date Jul 27, 2006
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Table-top electric heat sealer
    • Publication number 20060113292
    • Publication date Jun 1, 2006
    • Welcome Co., Ltd.
    • Shu-Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Electric heat sealer with safety device
    • Publication number 20050284858
    • Publication date Dec 29, 2005
    • Welcome Company, Ltd.
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Table-top electric heat sealer
    • Publication number 20050067398
    • Publication date Mar 31, 2005
    • Shu-Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Detachable heat sealing apparatus
    • Publication number 20040262281
    • Publication date Dec 30, 2004
    • Ammy Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Electric heat sealer
    • Publication number 20040144766
    • Publication date Jul 29, 2004
    • Welcome Co., Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Electric heat sealer with safety device
    • Publication number 20030019861
    • Publication date Jan 30, 2003
    • Welcome Co., Ltd.
    • Shu Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Hand-held electric heat sealer
    • Publication number 20020185484
    • Publication date Dec 12, 2002
    • Welcome Co., Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Table-top electric heat sealer
    • Publication number 20020070206
    • Publication date Jun 13, 2002
    • Welcome Company Ltd.
    • Shu-Hui Chou
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Handy electric sealer with safety means
    • Publication number 20010000608
    • Publication date May 3, 2001
    • Welcome Co., Ltd.
    • Richard Chang
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL