| 8408465 |
Portable optical card readers |
— |
2013-04-02 |
| 8033467 |
Portable optical card readers |
— |
2011-10-11 |
| 5268801 |
Method and apparatus for effecting data transfer with high precision reference data on a rotatable storage media |
Gajus Michelson, William W. Valliant |
1993-12-07 |
| 4972397 |
Dithering optical data logger |
Larry S. Zurbrick |
1990-11-20 |
| 4888759 |
Laser optical memory system having beam combining and separating apparatus for combining and separating reading and writing laser beams |
Gilbert Y. Chan |
1989-12-19 |
| 4622659 |
Focus detection and control apparatus for maintaining accurate focusing in an optical memory system by detecting reflected beam diameter variations at spaced predetermined locations |
Gilbert Y. Chan |
1986-11-11 |
| 4621353 |
Optical memory system providing improved focusing control and improved beam combining and separating apparatus |
Gilbert Y. Chan |
1986-11-04 |
| 4562568 |
Beam combining and separating apparatus useful for combining and separating reading and writing laser beams in an optical storage system |
Gilbert Y. Chan |
1985-12-31 |
| 4559622 |
Optical memory system providing improved focus detection and control by detecting reflected beam diameter variations at spaced predetermined locations in the system |
Gilbert Y. Chan |
1985-12-17 |
| 4544964 |
Strobe for read/write chain |
Kenneth R. Burns |
1985-10-01 |
| 4494226 |
Three beam optical memory system |
Edward V. LaBudde |
1985-01-15 |
| 4443870 |
Optical memory system providing track following |
Edward V. LaBudde |
1984-04-17 |
| 4428069 |
Apparatus for preformatting an optical disk |
John E. Kammerud |
1984-01-24 |
| 4428075 |
Methods of preformatting an optical disk |
John E. Kammerud |
1984-01-24 |
| 4417330 |
Optical memory system providing improved focusing control |
Edward V. LaBudde |
1983-11-22 |
| 4402061 |
Preformatted optical media for use in an optical memory system |
Edward V. LaBudde |
1983-08-30 |