Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4640118 | Method of and apparatus for measuring pile skin friction | Takeo Fukaya | 1987-02-03 |
| 4600809 | Telephone systems | Kaoru Tatsumi, Kuniyoshi Marui, Takaaki Ishii | 1986-07-15 |