Issued Patents All Time
Showing 51–65 of 65 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5568319 | Aspherical eyepiece | Masanobu Kaneko | 1996-10-22 |
| 5557463 | Eyepiece | — | 1996-09-17 |
| 5555039 | Eye measuring apparatus having an automatic fogging producing mechanism and method thereof | Yoichi Iki, Nobuyki Miyake | 1996-09-10 |
| 5550600 | Ophthalmic lens having a negative refractive power | — | 1996-08-27 |
| 5537163 | Ophthalmologic apparatus with automatic focusing using two reference marks and having an in-focus detecting system | — | 1996-07-16 |
| 5523807 | Progressive multifocal lens | Toshiaki Umeda, Fumio Takahashi | 1996-06-04 |
| 5510860 | Progressive multifocal lens | Toshiaki Umeda, Fumio Takahashi | 1996-04-23 |
| 5506630 | Progressive multifocal lens | Toshiaki Umeda, Fumio Takahashi | 1996-04-09 |
| 5504543 | Ophthalmic photographing apparatus having control means for stopping the operation and fixing the in-focus state | — | 1996-04-02 |
| 5285223 | Ophthalmic optical apparatus having an alignment optical system | Masanobu Kaneko | 1994-02-08 |
| 5223901 | Fixing device with temperature compensation in an image forming apparatus | Hirohisa Endo | 1993-06-29 |
| 5048945 | Progressive power lens | Fumio Takahashi, Ryuji Aizawa | 1991-09-17 |
| 5000559 | Ophthalmic lenses having progressively variable refracting power | Fumio Takahashi, Ryuji Aizawa | 1991-03-19 |
| 4988182 | Ophthalmic lenses having a progressively variable focal power | Fumio Takahashi, Ryuji Aizawa | 1991-01-29 |
| 4764788 | Copying machine equipped with a movable original holder | Masahiro Watashi, Hirohisa Endo, Tooru Nakamaru, Kazuhiro Mizude, Keiichi Kishimoto | 1988-08-16 |