Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11484947 | Machine tool | Takanori Shinohara | 2022-11-01 |
| 10189091 | Machine tool | Kensuke Tajima, Shinji Fujita, Kazuyuki Izumi | 2019-01-29 |
| 5796630 | Protective relay system provided with difference and addition filters | Takafumi Maeda, Hiroshi Yamakawa, Fumio Andow, Yasuhiro Kurosawa | 1998-08-18 |
| 4809305 | Cyclic digital information transmission system | — | 1989-02-28 |
| 4709295 | Digital protective relay system | Junichi Inagaki, Hachidai Ito | 1987-11-24 |
| 4695931 | Voltage/frequency converter with frequency drift compensation loop | Norio Fujisawa | 1987-09-22 |
| 4612594 | Protective relay system and sampling synchronizing method therefor | Ituo Shuto | 1986-09-16 |
| 4591992 | Method and system for identifying the direction of a fault in a power line | — | 1986-05-27 |
| 4577254 | Protective relay system | — | 1986-03-18 |
| 4541058 | Protective relay system | Fumio Andow, Ryotaro Kondow | 1985-09-10 |
| 4470093 | Protective relay system and sampling synchronizing method therefor | — | 1984-09-04 |
| 4420805 | Protective relaying system | Ryotaro Kondow, Junichi Inagaki | 1983-12-13 |
| 4419737 | Setting device for protective control system | Ryotaro Kondow, Junichi Inagaki, Kunio Matsuzawa | 1983-12-06 |
| 4371926 | Input/output information indication system | Ryotaro Kondow, Junichi Inagaki, Eiichi Okamoto | 1983-02-01 |
| 4347581 | Input setting method for digital operational devices | Ryotaro Kondow, Megumu Mitani, Yoshiji Nii | 1982-08-31 |
| 4339802 | Digital protective relaying devices | Ryotaro Kondow, Megumu Mitani, Eiichi Okamoto | 1982-07-13 |
| 4328551 | Apparatus and method for protection of electric power transmission lines and the like | Ryotaro Kondow, Kunio Matsuzawa | 1982-05-04 |
| 4314199 | Method for locating a fault point on a transmission line | Yukinari Yamakoshi | 1982-02-02 |