Issued Patents All Time
Showing 26–50 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5818681 | Electromagnetic relay drive circuit | Masayoshi Sakai | 1998-10-06 |
| 5798703 | Mat sensor | Masayoshi Sakai, Toshihito Shirai | 1998-08-25 |
| 5793197 | Apparatus for confirming stop of movable portion | Toshihito Shirai, Hiroji Anzai | 1998-08-11 |
| 5773972 | Transition detection circuit for detecting transitions in the state of an object of detection | Toshihito Shirai | 1998-06-30 |
| 5768077 | Earthing wire disconnection detection apparatus and leakage detection apparatus having an earthing wire disconnection detection function conductor | Norihiro Asada | 1998-06-16 |
| 5734269 | Bridge circuit fault monitoring apparatus using an output signal level from a bridge circuit and a power source current level to determine faults | Masayoshi Sakai, Toshihito Shirai, Hiroji Anzai | 1998-03-31 |
| 5717302 | Motor stopped verification apparatus | Masayoshi Sakai, Toshihito Shirai, Hiroji Anzai | 1998-02-10 |
| 5703452 | Safety ensuring apparatus | — | 1997-12-30 |
| 5675317 | Residual pressure sensor and residual pressure sensor monitoring apparatus | Masato Ichikawa, Masayoshi Sakai | 1997-10-07 |
| 5668706 | Load driving circuit | Masayoshi Sakai | 1997-09-16 |
| 5666081 | On-delay circuit | Masayoshi Sakai | 1997-09-09 |
| 5638043 | Warning apparatus | Masayoshi Sakai | 1997-06-10 |
| 5619110 | Safety ensuring apparatus | Noboru Sugimoto, Masatoshi Suzuki, Masayoshi Sakai, Ritsuo Mihira | 1997-04-08 |
| 5578987 | Monitoring apparatus for an alarm device | Zhou XuYang, Masayoshi Sakai | 1996-11-26 |
| 5574320 | Load drive circuit | Toshihito Shirai, Masayoshi Sakai | 1996-11-12 |
| 5568131 | Motor rotation judgement circuit and apparatus using such circuit for verifying that a motor is stopped | Masayoshi Sakai | 1996-10-22 |
| 5568059 | Current sensor and motor rotation sensor using such current sensor | Masayoshi Sakai | 1996-10-22 |
| 5519598 | Load driving circuit | Masayoshi Sakai | 1996-05-21 |
| 5508697 | Airplane detection system | Masakazu Kato, Masayoshi Sakai, Kiyoaki Inaba | 1996-04-16 |
| 5495228 | Fail-safe scan circuit and a multibeam sensor | Masakazu Kato | 1996-02-27 |
| 5442303 | Electromagnetically coupled fail-safe logic circuit | Norihiro Asada, Masakazu Kato, Masayoshi Esashi | 1995-08-15 |
| 5432337 | Fail-safe scanning circuit and multi-axis light beam-type sensor | Masakazu Kato | 1995-07-11 |
| 5428279 | Safety apparatus determining whether a detected presence is a work piece or a human | Noboru Sugimoto, Kazumi Narita | 1995-06-27 |
| 5345138 | Method and apparatus for assuring safe work | Masao Mukaidono, Noboru Sugimoto | 1994-09-06 |
| 5285721 | Slide operation control device for a press | Noboru Sugimoto, Souichi Kumekawa, Masao Mukaidono, Masayoshi Sakai | 1994-02-15 |