Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5856884 | Projection lens systems | — | 1999-01-05 |
| 5831776 | Projection optical system and projection exposure apparatus | Toshihiro Sasaya, Kazuo Ushida, Yutaka Suenaga | 1998-11-03 |
| 5805344 | Projection optical system and projection exposure apparatus | Toshihiro Sasaya, Kazuo Ushida, Yutaka Suenaga | 1998-09-08 |
| 5210646 | Color-corrected optical systems and method of selecting optical materials therefor | Paul N. Robb | 1993-05-11 |
| 5204782 | Color-corrected optical systems | Paul N. Robb | 1993-04-20 |
| 5020889 | Color-corrected optical systems | Paul N. Robb | 1991-06-04 |
| 5000548 | Microscope objective | — | 1991-03-19 |
| 4934801 | Optical imaging system | — | 1990-06-19 |
| 4929071 | Long-focus color-corrected petzval-type optical objective | — | 1990-05-29 |
| 4842384 | Optical system of the Petzval type | — | 1989-06-27 |
| 4834515 | Catadioptric imaging system with dioptric assembly of the petzval type | — | 1989-05-30 |
| 4790637 | Color-corrected catadioptric systems | Paul N. Robb | 1988-12-13 |
| 4768869 | Catadioptric imaging system | — | 1988-09-06 |
| 4765727 | Color-corrected lens systems | — | 1988-08-23 |
| 4762404 | Color-corrected lens systems | — | 1988-08-09 |
| 4761064 | Color-corrected lens systems | — | 1988-08-02 |
| 4743094 | Finite conjugate imaging system | — | 1988-05-10 |
| 4712886 | Lens doublet color-corrected for visible and near-infrared wavelengths | — | 1987-12-15 |
| 4704008 | Color-corrected prism systems | — | 1987-11-03 |
| 4704011 | Three-glass photographic objective color-corrected at four wavelengths | — | 1987-11-03 |
| 4702569 | Color-corrected Petzval lens systems | — | 1987-10-27 |
| 4681407 | Two-glass photographic objective color-corrected at four wavelengths | — | 1987-07-21 |