Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7057993 | Copy protection using multiple security levels on a programmable CD-ROM | Michael Inchalik, Bruce Ha | 2006-06-06 |
| 6497988 | Phase-change recording element for write once applications | Yuan-Sheng Tyan, Thomas R. Cushman, Giuseppe Farruggia, George R. Olin, Bruno Primerano +1 more | 2002-12-24 |
| 6480462 | Hybrid optical disc construction | Bruce Ha, Thomas C. Burgo | 2002-11-12 |
| 6212158 | Hybrid optical disc construction | Bruce Ha, Thomas C. Burgo | 2001-04-03 |
| 6126191 | Air bag module assembly | Dean M. Pepperine, Jeffrey A. Shepherd | 2000-10-03 |
| 5914925 | DRDW differential phase tracking method and apparatus | Tzuo-Chang Lee | 1999-06-22 |
| 5872768 | Optical discs with cover sheets and pressure equalization of the enclosed air | Boris A. Shtipelman, Charles J. Simpson | 1999-02-16 |
| 5859830 | Dynamic tracking control in an optical recording system by diffraction-based mark formation detection | Clarke K. Eastman | 1999-01-12 |
| 5828630 | Diffraction-based direct read during write using magneto-optic recording media | Edward Charles Gage, Clarke K. Eastman, Steven C. Dohmeier | 1998-10-27 |
| 5774447 | Optical discs with cover sheets and dynamic pressure stabilization of the enclosed air | Boris A. Shtipelman | 1998-06-30 |
| 5774448 | Air sandwiched optical discs with closable pressure relief holes | Boris A. Shtipelman | 1998-06-30 |
| 5598386 | Optimized linear motors for focus/tracking actuators in optical disk drives | Boris A. Shtipelman | 1997-01-28 |
| 5561646 | Focus/tracking actuator with moving-magnet motors | Boris A. Shtipelman | 1996-10-01 |
| 5561655 | Apparatus and method for differential tracking in a magneto-optic data storage system using mark edge detection | Edward Charles Gage | 1996-10-01 |
| 5215808 | Optical tape recording media with integral dust-defocusing transparent film | — | 1993-06-01 |
| 5152597 | Magneto-optic readout using a polarization-preserving optical fiber | — | 1992-10-06 |
| 5140489 | Disk cartridge adapted for use with different disk drives | — | 1992-08-18 |
| 4949311 | Single laser direct read after write system (draw) | — | 1990-08-14 |
| 4819218 | Quasi-constant linear-velocity disk having corresponding radii of adjacent annular zones related by a rational number for distributing prerecorded indicia to form a coherent write clock signal | — | 1989-04-04 |
| 4811317 | Clock resynchronization after a track jump | Michael G. Fairchild | 1989-03-07 |
| 4530082 | Optical disc write/read employing passive focus maintenance | Dennis G. Howe | 1985-07-16 |
| 4228573 | Method for assembling heat exchangers | — | 1980-10-21 |