Issued Patents All Time
Showing 701–725 of 745 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5036185 | Optical apparatus for detecting a focusing state | — | 1991-07-30 |
| 5018127 | Light emitting apparatus having a plurality of light emitting points | — | 1991-05-21 |
| 4984225 | System for applying magnetic field to opto-magnetic memory | — | 1991-01-08 |
| 4944037 | Optical system for recording information in erasable and non-erasable modes | — | 1990-07-24 |
| 4890272 | Apparatus for correcting photodetector signals in a system for retrieving information from an optical recording medium | — | 1989-12-26 |
| 4857719 | Flat type optical head for focusing a light beam onto an optical memory | — | 1989-08-15 |
| 4835762 | Optical memory device and system | — | 1989-05-30 |
| 4825064 | Apparatus for energizing a semiconductor laser array having a plurality of light beam emitting points | — | 1989-04-25 |
| 4804835 | Optical head having guide means with first and second polarizing surfaces | — | 1989-02-14 |
| 4797868 | Optical system employing a laser beam for focusing, tracking and transferring information signals with respect to a magneto-optical memory | — | 1989-01-10 |
| 4783589 | Focus and tracking detection apparatus for optical head employing light guide means having different radii of curvature | — | 1988-11-08 |
| 4766582 | Optical head | — | 1988-08-23 |
| 4764912 | Optical focusing in magneto-optic disk system | Akihiko Doi | 1988-08-16 |
| 4742219 | Apparatus for detecting the focusing state and positional accuracy of a light beam directed onto an optical disk tracking guide in an optical read/write system | — | 1988-05-03 |
| 4725725 | Optical head | — | 1988-02-16 |
| 4716283 | Optical head for focusing a light beam on an optical disk | — | 1987-12-29 |
| 4701604 | Optical head | — | 1987-10-20 |
| 4694443 | Optical system for tracking an information recording medium | — | 1987-09-15 |
| 4689781 | Optical system for tracing information recording medium with multiple beams | — | 1987-08-25 |
| 4684797 | Optical system and method for reducing vibration of an objective lens in an optical head assembly of an optical read/write system | Akihiko Doi | 1987-08-04 |
| 4665512 | Optical head for erasing | — | 1987-05-12 |
| 4656348 | Optical head | — | 1987-04-07 |
| 4654519 | Optical head | — | 1987-03-31 |
| 4654515 | Optical head for focussing a light beam on an information recording medium | — | 1987-03-31 |
| 4654516 | Optical head | — | 1987-03-31 |