Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5566150 | Multibeam optical apparatus and method for tracking control for an optical disk having a set of tracks | — | 1996-10-15 |
| 5239414 | Laser astigmatism compensation | — | 1993-08-24 |
| 5233583 | Tracking and reading system for an optical medium and medium for use therewith | — | 1993-08-03 |
| 5157555 | Apparatus for adjustable correction of spherical aberration | — | 1992-10-20 |
| 4827130 | Selectable field infrared imager and lens set | — | 1989-05-02 |
| 4768184 | Apparatus and method for minimizing magnification distortion in multi-track optical recording | — | 1988-08-30 |
| 4754446 | Optical recording system using refracted write beam for erasing | — | 1988-06-28 |
| 4712207 | Apparatus for erasing information on a reversible optical recording medium | — | 1987-12-08 |
| 4590594 | Side-spot focus apparatus for optical disc recording and/or playback system | — | 1986-05-20 |
| 4520472 | Beam expansion and relay optics for laser diode array | — | 1985-05-28 |
| 4507773 | High efficiency precision laser beam switch | James T. McCann, Lawrence W. Dobbins | 1985-03-26 |
| 4459690 | Multi-beam optical record and playback apparatus having an improved beam splitter | Stephen L. Corsover, George J. Ammon | 1984-07-10 |
| 4449212 | Multi-beam optical record and playback apparatus | — | 1984-05-15 |
| 4449215 | Apparatus for varying track spacing in multi-track optical record systems | — | 1984-05-15 |
| 4432085 | Dual input telescope for multi-beam optical record and playback apparatus | Genevieve L. Allee | 1984-02-14 |