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David Hong
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Hong Kong, CN
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Patents Grants
last 30 patents
Information
Patent Grant
Air inflating device and tire repair machine comprising same
Patent number
10,753,351
Issue date
Aug 25, 2020
ACTIVE TOOLS INTERNATIONAL (HK) LTD.
David Ying Chi Hong
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Gas cylinder residual gas volume indicator
Patent number
8,171,784
Issue date
May 8, 2012
Winners Products Engineering Ltd.
David Hong
F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Patents Applications
last 30 patents
Information
Patent Application
AIR COMPRESSOR CYLINDER, AIR COMPRESSOR, VEHICLE SEAT, AND VEHICLE
Publication number
20210164463
Publication date
Jun 3, 2021
David HONG
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
AIR INFLATING DEVICE AND TIRE REPAIR MACHINE COMPRISING SAME
Publication number
20180238314
Publication date
Aug 23, 2018
ACTIVE TOOLS INTERNATIONAL (HK) LTD.
David Ying Chi Hong
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
SYSTEMS, DEVICES, AND METHODS FOR MANAGING COMMODITIES
Publication number
20160005249
Publication date
Jan 7, 2016
ACTIVE TOOLS INTERNATIONAL (HK) LTD.
David Ying Chi Hong
G07 - CHECKING-DEVICES
Information
Patent Application
GAS CYLINDER RESIDUAL GAS VOLUME INDICATOR
Publication number
20110100110
Publication date
May 5, 2011
WINNERS PRODUCTS ENGINEERING LTD.
David Hong
F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS