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Patents Grantslast 30 patents

  • Information Patent Grant

    Self-sinking aeration hose
    • Patent number 9,914,656
    • Issue date Mar 13, 2018
    • Tak Kwong Kwan
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Self-sinking aeration hose
    • Patent number 9,915,390
    • Issue date Mar 13, 2018
    • Tak Kwong Kwan
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Self-sinking aeration hose
    • Patent number 9,832,978
    • Issue date Dec 5, 2017
    • Tak Kwong Kwan
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Self-sinking aeration hose
    • Patent number 9,764,972
    • Issue date Sep 19, 2017
    • Tak Kwong Kwan
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Self-sinking and air permeable plastic material
    • Patent number 9,758,659
    • Issue date Sep 12, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Self-sinking and air permeable plastic material
    • Patent number 9,758,660
    • Issue date Sep 12, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Self-sinking and air permeable plastic material
    • Patent number 9,758,661
    • Issue date Sep 12, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Self-sinking and air permeable plastic material
    • Patent number 9,631,079
    • Issue date Apr 25, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Self-sinking and air permeable plastic material
    • Patent number 9,631,080
    • Issue date Apr 25, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

  • Information Patent Application

    SELF-SINKING AERATION HOSE
    • Publication number 20170158533
    • Publication date Jun 8, 2017
    • Tak Kwong Kwan
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Application

    SELF-SINKING AERATION HOSE
    • Publication number 20170122480
    • Publication date May 4, 2017
    • Tak Kwong Kwan
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Application

    SELF-SINKING AERATION HOSE
    • Publication number 20170121195
    • Publication date May 4, 2017
    • Tak Kwong Kwan
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Application

    SELF-SINKING AERATION HOSE
    • Publication number 20170121196
    • Publication date May 4, 2017
    • Tak Kwong Kwan
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Application

    SELF-SINKING AERATION HOSE
    • Publication number 20170088702
    • Publication date Mar 30, 2017
    • Tak Kwong Kwan
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Application

    SELF-SINKING AND AIR PERMEABLE PLASTIC MATERIAL
    • Publication number 20170051143
    • Publication date Feb 23, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    SELF-SINKING AND AIR PERMEABLE PLASTIC MATERIAL
    • Publication number 20170051139
    • Publication date Feb 23, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    SELF-SINKING AND AIR PERMEABLE PLASTIC MATERIAL
    • Publication number 20170051140
    • Publication date Feb 23, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    SELF-SINKING AND AIR PERMEABLE PLASTIC MATERIAL
    • Publication number 20170051141
    • Publication date Feb 23, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Application

    SELF-SINKING AND AIR PERMEABLE PLASTIC MATERIAL
    • Publication number 20170051142
    • Publication date Feb 23, 2017
    • Tak Kwong Kwan
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...