Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5664312 | Method of detaching a driver bit from a screwdriver and a stop ring provided with a function of removing the driver bit appropriate for practicing the method | Katsuhiko Sasaki, Toshiyuki Kani | 1997-09-09 |