Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4914645 | Optical disk tracking and seeking systems and specific track formats using servo areas | Johannes J. Verboom, David L. Schell, David E. Lewis, Gregory Hofer, Kathleen M. Connelly +3 more | 1990-04-03 |
| 4879707 | Optical disk tracking and seeking systems specific track formats using discontinuities | Johannes J. Verboom, Pierre Robert Valère Sonneville | 1989-11-07 |
| 4879708 | Optical disk tracking and seeking systems specific track formats using wobbled pits | Johannes J. Verboom | 1989-11-07 |
| 4864552 | Driving signal for coarse servo employing sampled offset signal | David L. Schell | 1989-09-05 |
| 4855977 | Track seeking apparatus and method using sampled information | David L. Schell | 1989-08-08 |
| 4807211 | Apparatus for inscribing and/or reading a record carrier | — | 1989-02-21 |
| 4807214 | Apparatus for recording and/or reading information on an optical record carrier provided with preformed tracks | — | 1989-02-21 |
| 4779253 | Sampled servo for an optical disk drive | Johannes J. Verboom, David L. Schell, David E. Lewis | 1988-10-18 |