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last 30 patents
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Patent Grant
Modular assembled artificial skating rink
Patent number
9,777,441
Issue date
Oct 3, 2017
Guang Jing Li
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Patents Applications
last 30 patents
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Patent Application
MODULAR ASSEMBLED ARTIFICIAL SKATING RINK
Publication number
20150322631
Publication date
Nov 12, 2015
Guang Jing LI
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES