Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5254899 | Micro-traveller with ultrasonic motor | Makoto Suzuki, Ichiro Horikoshi, Fujio Ozawa, Masao Kasuga | 1993-10-19 |
| 5079470 | Standing-wave type ultrasonic motor and timepiece | Masao Kasuga, Hiroshi Kitamura | 1992-01-07 |
| 5056201 | Method of making a travelling-wave motor | Masao Kasuga, Takayuki Mori | 1991-10-15 |
| 5043956 | Wristwatch with oscillation alarm | Kou Yamazaki, Keishi Honmura | 1991-08-27 |
| 5025186 | Ultrasonic motor | — | 1991-06-18 |
| 5023853 | Electric apparatus with silent alarm | Masayuki Kawata | 1991-06-11 |
| 4721058 | Paper cutting unit of automatic drawing machines | Mamoru Hayamizu | 1988-01-26 |
| 4645356 | Wristwatch | Eiichi Matsuura | 1987-02-24 |
| 4447163 | Stem mechanism for a watch | Isamu Nishida | 1984-05-08 |