Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D424581 | Work machine for power shovel | Yoshihiro Sekiguchi | 2000-05-09 |
| 5950426 | Hydraulic circuit for hydraulic machine | Ryuzo Maeda, Toshiyuki Shigeta | 1999-09-14 |
| 5052883 | Implement positioning control system for construction machines | Shoji Tozawa, Yoshitaka Sakata, Muneo Katano, Ryuzo Maeda | 1991-10-01 |
| 4934463 | Automatic implement position control system | Shuji Ishida, Shoji Tozawa, Shunji Asao, Masashi Musha, Kenichi Yamamoto +5 more | 1990-06-19 |
| 4884398 | Method of and apparatus for reducing engine smoke emissions | Keisuke Kishitani, Masayoshi Kajitani, Shoji Tozawa, Masanori Satoh, Kisaburo Otabe +1 more | 1989-12-05 |
| 4866932 | Apparatus for treating particulate emission from diesel engine | Masayoshi Kajitani, Masao Kodama, Masanobu Takano | 1989-09-19 |
| 4853859 | Operation data recording system | Shoji Tozawa, Tsuneo Hisatake, Tadasi Atono | 1989-08-01 |
| 4757454 | Operation data-recording system for a machine | Tsuneo Hisatake, Tadashi Atono, Shoji Tozawa, Masao Fujiwara, Yoshinobu Nakamura | 1988-07-12 |
| 4217927 | Relief and make-up valve assembly | — | 1980-08-19 |
| 4199004 | Relief and make-up valve assembly | Hideo Wada | 1980-04-22 |