Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D567693 | Bell | Atsushi Endo, Kazuharu Seki | 2008-04-29 |
| 7182039 | Striker mechanism for bell unit | Motohisa Ishiwa, Kazuharu Seki | 2007-02-27 |
| 6450115 | Bicycle bell with inverted dome | Motohisa Ishiwa, Kazaharu Seki | 2002-09-17 |
| 5307756 | Rotating striker bell | Motohisa Ishiwa, Kazuharu Seki | 1994-05-03 |