Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7375820 | Interference measuring apparatus for detecting a plurality of stable phase difference signals | Ko Ishizuka, Hidejiro Kadowaki, Yasushi Kaneda, Shigeki Kato, Takayuki Kadoshima | 2008-05-20 |
| 7034947 | Compact interference measuring apparatus for detecting the magnitude and direction of positional deviation | Ko Ishizuka, Hidejiro Kadowaki, Yasushi Kaneda, Shigeki Kato, Takayuki Kadoshima | 2006-04-25 |
| 6674066 | Encoder | Yasushi Kaneda, Hidejiro Kadowaki, Ko Ishizuka, Shigeki Kato, Takayuki Kadoshima | 2004-01-06 |
| 6657181 | Optical element used in compact interference measuring apparatus detecting plurality of phase difference signals | Ko Ishizuka, Hidejiro Kadowaki, Yasushi Kaneda, Shigeki Kato, Takayuki Kadoshima | 2003-12-02 |
| 6618218 | Displacement detecting apparatus and information recording apparatus | Hidejiro Kadowaki, Ko Ishizuka, Yasushi Kaneda, Shigeki Kato, Takayuki Kadoshima | 2003-09-09 |
| 6473184 | Interferometer which divides light beams into a plurality of beams with different optical paths | Ko Ishizuka, Hidejiro Kadowaki, Yasushi Kaneda, Shigeki Kato, Takayuki Kadoshima | 2002-10-29 |
| 4972501 | Image processing apparatus | — | 1990-11-20 |
| 4651299 | Data processing apparatus | Yasuko Miyazaki, Mikiharu Matsuoka, Takashi Kanemoto, Hirohiko Katayama | 1987-03-17 |
| 4587663 | Conversation device with space and feed movement related to actuation time of control key | Mikiharu Matsuoka, Hirohiko Katayama | 1986-05-06 |
| 4421950 | Communication device having coupling means | — | 1983-12-20 |
| 4409437 | Apparatus for indicating telephone line state | — | 1983-10-11 |
| 4375060 | Electronic apparatus having special key | — | 1983-02-22 |
| 4261042 | Key signal entering device for thin electronic apparatus | Masumi Ishiwatari, Mitsuaki Seki | 1981-04-07 |