Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853504 | Triple action pressure switch apparatus | Hazime Tanaka, Hirayoshi Suzuki | 1989-08-01 |
| 4827094 | Dual-action pressure switch apparatus | Hazime Tanaka, Hirayosho Suzuki | 1989-05-02 |