Assignee
CHEN CHING FEI
TW·3 granted patents·41 citations·filing 1989–2003
Top patents by PatentIndex Score
3 records- 0172US4960464AErasable ink compositionCHEN CHING FEI·Filed 1989·Granted Oct 2, 1990·27 cites·1 claims
- 0265US7195491B1Writing board structureCHEN CHING-FEI·Filed 2003·Granted Mar 27, 2007·12 cites·4 claims
- 0326US5030026ALeakproof fountain pen with ballbearing tipCHEN CHING FEI·Filed 1990·Granted Jul 9, 1991·2 cites·2 claims
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