Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5294872 | Method and apparatus for operating vacuum cleaner | Haruo Koharagi, Kazuo Tahara, Tsunehiro Endo, Kunio Miyashita, Yoshitaro Ishii +5 more | 1994-03-15 |
| RE34286 | Method and apparatus for operating vacuum cleaner | Hisanori Toyoshima, Fumio Jyoraku, Yoshitaro Ishii, Kazuo Tahara, Haruo Koharagi +4 more | 1993-06-22 |
| 5166585 | Motor control apparatus for an electric vacuum cleaner | Haruo Koharagi, Kazuo Tahara, Tsunehiro Endo, Kunio Miyashita, Yoshitaro Ishii +5 more | 1992-11-24 |
| 5144716 | Electric cleaner, method for producing same and mount base and bumper for electric cleaner | Kouiti Sagawa, Gorou Sasai, Hidetoshi Sakurai | 1992-09-08 |
| 5101534 | Suction nozzle with rotary brush for vacuum cleaner | Susumu Satoh, Koichi Sagawa | 1992-04-07 |
| 5075607 | Method and apparatus for operating vacuum cleaner | Haruo Koharagi, Kazuo Tahara, Tsunehiro Endo, Kunio Miyashita, Yoshitaro Ishii +5 more | 1991-12-24 |
| 5054156 | Suction nozzle with rotary brush for vacuum cleaner | Susumu Satoh, Koichi Sagawa | 1991-10-08 |
| D315624 | Electric vacuum cleaner | Shigetaka Kimura, Kouichi Hasegawa, Tetsuro Aobori, Kouichi Sagawa | 1991-03-19 |
| 4983895 | Method and apparatus for operating vacuum cleaner | Haruo Koharagi, Kazuo Tahara, Tsunehiro Endo, Kunio Miyashita, Yoshitaro Ishii +5 more | 1991-01-08 |
| 4958406 | Method and apparatus for operating vacuum cleaner | Hisanori Toyoshima, Fumio Jyoraku, Yoshitaro Ishii, Kazuo Tahara, Haruo Koharagi +4 more | 1990-09-25 |
| 4880474 | Method and apparatus for operating vacuum cleaner | Haruo Koharagi, Kazuo Tahara, Tsunehiro Endo, Kunio Miyashita, Yoshitaro Ishii +5 more | 1989-11-14 |
| 4846768 | Variable-speed driving device | Yasuo Kitami, Hidenori Tezuka | 1989-07-11 |
| 4446594 | Upright type electric cleaner | Yoshitaro Ishii, Masao Sunagawa | 1984-05-08 |