YC

Yen Chin-Fa

Overall (All Time): #1,619,261 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6487297 Structure of a loudspeaker — 2002-11-26
5218642 Feedback noise-eliminating microphone circuit — 1993-06-08
5079679 Multi-purpose traffic director's stick — 1992-01-07