Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5107977 | Method of and system for drawing out torsion spring | Masazumi Ogawa | 1992-04-28 |
| 5029318 | Magnetic tape cassette with lock plates | — | 1991-07-02 |
| 5010436 | Apparatus for incorporating lock plates in video cassettes | — | 1991-04-23 |
| 4802554 | Grease applying method | Yuzo Tsunekawa, Kazumi Kitamura | 1989-02-07 |