Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6498853 | Echo-cancelling optical microphone | — | 2002-12-24 |
| 6493451 | Communication helmet | Alexander Kots, Kazuo Takahashi, Okihiro Kobayashi | 2002-12-10 |
| 6462808 | Small optical microphone/sensor | Alexander Kots | 2002-10-08 |
| 6459798 | Sound-collecting device | Alexander Kots, Okihiro Kobayashi, Nobuhiro Miyahara | 2002-10-01 |