Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7072485 | Method for manufacturing diaphragm for loudspeaker, diaphragm for loudspeaker made thereby, and loudspeaker using the same | Hitoshi Sato, Kiyoshi Ikeda, Hiroko Yamazaki | 2006-07-04 |
| 6627140 | Method for manufacturing diaphragm for loudspeaker | Hitoshi Sato, Kiyoshi Ikeda, Hiroko Yamazaki | 2003-09-30 |
| 6543574 | Method of making a speaker edge containing isocyanate and polyol | Shinya Kaneko, Kiyosi Ikeda, Hiroko Yamasaki | 2003-04-08 |