Assignee

Cheng chang-ming

2 granted patents·8 citations·filing 1997–2012

Technology mixF21S1 F21V1

Top patents by PatentIndex Score

2 records

0144USD393280SCombined writing instrument and roll-out mapCheng chang-ming·Filed 1997·Granted Apr 7, 1998·8 cites·1 claims
0243US8944633B2Lighting device recessively mounted in a platformCheng chang-ming·Filed 2012·Granted Feb 3, 2015·0 cites·20 claims

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