Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D325273 | Vacuum cleaner | Chikashi Kuriya | 1992-04-07 |
| D325274 | Vacuum cleaner | — | 1992-04-07 |
| D315431 | Vacuum cleaner | Chikashi Kuriya, Mika Nakajima | 1991-03-12 |
| D315042 | Vacuum cleaner | — | 1991-02-26 |
| D307658 | Vacuum cleaner | Chikashi Kuriya, Mika Nakajima | 1990-05-01 |
| D302876 | Vacuum cleaner | Chikashi Kuriya, Mika Nakajima | 1989-08-15 |
| D296358 | Oil heater | Shuzo Sawa | 1988-06-21 |
| D295554 | Oil heater | Shuzo Sawa | 1988-05-03 |
| D277600 | Oil heater | Shigetoshi Hazama, Shuzo Sawa, Akira Esaki | 1985-02-12 |
| D276363 | Oil heater | Shigetoshi Hazama, Shuzo Sawa, Akira Esaki | 1984-11-13 |
| D276365 | Oil heater | Shigetoshi Hazama, Shuzo Sawa, Akira Esaki | 1984-11-13 |
| D276366 | Oil heater | Shigetoshi Hazama, Shuzo Sawa, Akira Esaki | 1984-11-13 |
| D260904 | Combined electronic calculating machine and timepiece | — | 1981-09-22 |
| D258891 | Electronic calculating machine | Isao Kitai | 1981-04-14 |
| D257045 | Electronic calculating machine | Tsutomu Yamasaki | 1980-09-23 |
| D256696 | Electronic calculating machine | — | 1980-09-02 |
| D255125 | Calculating machine | Shigetoshi Hazama | 1980-05-27 |
| D255126 | Calculating machine | Yoshihisa Ohie | 1980-05-27 |