ZC

Ziyi Cheng

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Tianjing, CN: #1 of 7 inventorsTop 15%
Overall (All Time): #1,032,218 of 4,157,543Top 25%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
7227957 Noise-suppressing receiver — 2007-06-05
7194095 Anti-noise pick-up — 2007-03-20
6757399 Anti-noise-electret pick-up with an electret — 2004-06-29
6584208 Ear transceiver — 2003-06-24
6377697 Ear-mounted headset device — 2002-04-23