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Xihua, CN
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last 30 patents
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Patent Grant
Safety mechanical barrier and system for above-ground pool ladders
Patent number
10,415,310
Issue date
Sep 17, 2019
POLYGROUP MACAU LIMITED (BVI)
Elmer Cheng
E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information
Patent Grant
Safety mechanical barrier and system for above-ground pool ladders
Patent number
10,113,361
Issue date
Oct 30, 2018
POLYGROUP MACAU LIMITED (BVI)
Elmer Cheng
E04 - BUILDING
Patents Applications
last 30 patents
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Patent Application
SAFETY MECHANICAL BARRIER AND SYSTEM FOR ABOVE-GROUND POOL LADDERS
Publication number
20190024456
Publication date
Jan 24, 2019
POLYGROUP MACAU LIMITED (BVI)
Elmer Cheng
E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information
Patent Application
SAFETY MECHANICAL BARRIER AND SYSTEM FOR ABOVE-GROUND POOL LADDERS
Publication number
20160160562
Publication date
Jun 9, 2016
POLYGROUP MACAU LIMITED (BVI)
Elmer Cheng
E04 - BUILDING