Issued Patents All Time
Showing 26–50 of 72 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699088 | Recording head for a magnetic printer | Hitoshi Isono, Kenji Ohta, Junichiro Nakayama | 1997-12-16 |
| 5684519 | Ink jet head with buckling structure body | Hirotsugu Matoba, Susumu Hirata, Yorishige Ishii, Shingo Abe, Kenji Ohta | 1997-11-04 |
| 5676854 | Optical memory having narrowed track pitch | Akira Takahashi, Kenji Ohta, Michinobu Mieda, Yoshiteru Murakami | 1997-10-14 |
| 5666141 | Ink jet head and a method of manufacturing thereof | Hirotsugu Matoba, Susumu Hirata, Yorishige Ishii, Kenji Ohta, Shingo Abe +1 more | 1997-09-09 |
| 5666345 | Optical memory medium with predetermined guide tracks and prepits | Akira Takahashi, Kenji Ohta, Toshihisa Deguchi, Kazuo Van | 1997-09-09 |
| 5645978 | Method for manufacturing optical disk | Akira Takahashi, Kenji Ohta | 1997-07-08 |
| 5627576 | Ink jet head using excited progressive waves | Susumu Hirata, Yorishige Ishii, Kenji Ohta, Kazuhiro Kimura | 1997-05-06 |
| 5586109 | Optical memory having narrowed track pitch | Akira Takahashi, Kenji Ohta, Michinobu Mieda, Yoshiteru Murakami | 1996-12-17 |
| 5581538 | Recording/reproducing apparatus with a probe to detect data recorded in pits and projections of a recording medium | Hirotsugu Matoba, Susumu Hirata, Yorishige Ishii, Kenji Ohta | 1996-12-03 |
| 5570336 | Information recording and reproducing apparatus having a slider formal of single crystal silicon body and cantilever | Yorishige Ishii, Kenji Ohta, Kazuhiro Kimura, Susumu Hirata | 1996-10-29 |
| 5500850 | Optical disk with grooves and pits of different depths | Kazuo Van, Kenji Ohta, Toshikazu Nagaura, Hirotoshi Takemori, Hirotaka Toki | 1996-03-19 |
| 5491500 | Ink jet head | Susumu Hirata, Yorishige Ishii, Kenji Ohta, Kazuhiro Kimura | 1996-02-13 |
| 5490131 | Optical disk | Kenji Ohta, Toshikazu Nagaura, Masayasu Futagawa, Shinji Yamagami, Yoshiteru Murakami +3 more | 1996-02-06 |
| 5470694 | Optical memory element and manufacturing method thereof | Kenji Ohta, Junji Hirokane, Akira Takahashi, Shohichi Katoh, Toshihisa Deguchi | 1995-11-28 |
| 5459711 | Optical recording element and driving system | Kenji Ohta, Hiroyuki Katayama, Akira Takahashi, Junji Hirokane, Yukinori Nishitani +2 more | 1995-10-17 |
| 5457006 | Method of manufacturing photo-mask and photo-mask manufactured thereby | Junji Hirokane, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta, Junichi Washo +3 more | 1995-10-10 |
| 5453975 | Optical disc with surface coating and manufacturing method therefor | Kenji Ohta, Toshikazu Nagaura | 1995-09-26 |
| D361944 | Combined wrist watch housing and bracelet | Haruya Ohba | 1995-09-05 |
| 5412630 | Tracking system for optical disc memory using tracking error signals from main beam and auxiliary beams | Toshihisa Deguchi, Kenji Ohta, Shohichi Katoh | 1995-05-02 |
| 5403683 | Photo-mask | Kenji Ohta, Junji Hirokane, Akira Shibata, Yoshiyuki Nagahara, Kazuo Van +1 more | 1995-04-04 |
| 5399461 | Optical disk for use in optical memory devices | Kazuo Van, Kenji Ohta, Toshikazu Nagaura, Hirotoshi Takemori, Hirotaka Toki | 1995-03-21 |
| 5398011 | Microrelay and a method for producing the same | Kasuhiro Kimura, Susumu Hirata, Yorishige Ishii, Kenji Ohta | 1995-03-14 |
| 5383176 | Optical disk | Akira Takahashi, Kenji Ohta | 1995-01-17 |
| 5341362 | Optical memory device having guide tracks shaped for increasing the quality of information signals | Yoshikazu Fujii, Toshihisa Deguchi, Kenji Ohta | 1994-08-23 |
| 5335220 | Optical recording element and driving system | Kenji Ohta, Hiroyuki Katayama, Akira Takahashi, Junji Hirokane, Yukinori Nishitani +2 more | 1994-08-02 |