Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5872768 | Optical discs with cover sheets and pressure equalization of the enclosed air | James A. Barnard, Charles J. Simpson | 1999-02-16 |
| 5856964 | Multihead optical disc drives with direct reading after writing operation | Edward Charles Gage | 1999-01-05 |
| 5774447 | Optical discs with cover sheets and dynamic pressure stabilization of the enclosed air | James A. Barnard | 1998-06-30 |
| 5774448 | Air sandwiched optical discs with closable pressure relief holes | James A. Barnard | 1998-06-30 |
| 5598386 | Optimized linear motors for focus/tracking actuators in optical disk drives | James A. Barnard | 1997-01-28 |
| 5561646 | Focus/tracking actuator with moving-magnet motors | James A. Barnard | 1996-10-01 |
| 5428589 | Apparatus and method for an electromagnetic actuator with two orthogonal axes of motion | — | 1995-06-27 |
| 5278820 | Apparatus and method for a radial access mechanism for a disk player/recorder | — | 1994-01-11 |
| 5220222 | Magnetic bushings for an optical access actuator | — | 1993-06-15 |
| 5138605 | Low-profile radial access mechanism for disk recording/playback apparatus, with optical head mounted on a carriage | Paul D. Heppner, Albert A. Halter | 1992-08-11 |
| 5016238 | Linear actuator for radial access in disk recorder/player | Paul D. Heppner | 1991-05-14 |
| 4922145 | Stepper motor | — | 1990-05-01 |
| 4893206 | Pivoting radial access mechanism with spinning support shaft | David L. White | 1990-01-09 |
| 4860137 | Flexure-mounted radial access apparatus for disk recorder/player | — | 1989-08-22 |
| 4775907 | Radial access mechanism for disk recording/playback apparatus | — | 1988-10-04 |
| 4673197 | Map display apparatus and method | Manya Shtipelman | 1987-06-16 |
| 4543020 | Method of manufacturing large gears | — | 1985-09-24 |