Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6058081 | Optical drive system having servomotor operated relative to maximum quad sum signal | David L. Schell, Randolph Scott Crupper, Kurt W. Getreuer, Leonardus J. Grassens, Marvin B. Davis | 2000-05-02 |
| 5917045 | Dimeric non-azo naphthalimides and uses for same | Ronald E. Utecht, Millard M. Judy, J. Lester Matthews | 1999-06-29 |
| 5878015 | Laser driver for controlling electrical current passed to a laser in an optical disc system | David L. Schell | 1999-03-02 |
| 5796703 | Apparatus for controlling an electrical current passed to a writing device in an optical storage system | David L. Schell | 1998-08-18 |
| 5766600 | Non-azo naphtalimide dyes and uses for same | Ronald E. Utecht, Millard M. Judy, J. Lester Matthews | 1998-06-16 |
| 5729511 | Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal | David L. Schell, Randolph Scott Crupper, Marvin B. Davis, Kurt W. Getreuer, Leonardus J. Grassens | 1998-03-17 |
| 5721714 | Method and apparatus for controlling bias levels in a magneto-optical recording device | — | 1998-02-24 |
| 5719836 | Optical seeking method and apparatus generating track count signal from tracking error signal and data signal | — | 1998-02-17 |
| 5700979 | Flexible strip cable with extension for testing | Kent Murphy | 1997-12-23 |
| 5666333 | Biasing level controller for magneto-optical recording device | — | 1997-09-09 |
| 5659526 | Optical seeking apparatus with track crossing signal generation using a corrected tracking error signal having a constant amplitude during periods of data | — | 1997-08-19 |
| 5581526 | Optical seeking method and apparatus with track counting using tracking error signal having constant amplitude during data segments | — | 1996-12-03 |
| 5565551 | Non-azo naphthalimide dyes and uses for same | Ronald E. Utecht, Millard M. Judy, J. Lester Matthews | 1996-10-15 |
| 5472878 | Fluorescent method for monitoring oil degradation | Ronald E. Utecht, Millard M. Judy, J. Lester Matthews | 1995-12-05 |
| 5420136 | Eradication of pathogenic biological contaminants using non-azo naphthalimide dyes | Ronald E. Utecht, Millard M. Judy, J. Lester Matthews | 1995-05-30 |
| 5308773 | Non-azo 1,8-naphthalimide dyes for the detection and quantitation of a paramagnetic metal cation in a non-aqueous medium | Ronald E. Utecht, Millard M. Judy, J. Lester Matthews | 1994-05-03 |
| 5235045 | Non-azo naphthalimide dyes | Ronald E. Utecht, Millard M. Judy, J. Lester Matthews | 1993-08-10 |
| 4914645 | Optical disk tracking and seeking systems and specific track formats using servo areas | Kurt W. Getreuer, Johannes J. Verboom, David L. Schell, Gregory Hofer, Kathleen M. Connelly +3 more | 1990-04-03 |
| 4849082 | Ion implantation of zirconium alloys with hafnium | David L. Baty, William C. Young | 1989-07-18 |
| 4779253 | Sampled servo for an optical disk drive | Kurt W. Getreuer, Johannes J. Verboom, David L. Schell | 1988-10-18 |
| 4456548 | Composition and method for making conductive polymers | Davida W. Kalina, Tsung-Ein Tsai | 1984-06-26 |
| 4224644 | Method and apparatus for controlling a tape player/recorder for retrieving and playing prerecorded information | Victor Blum | 1980-09-23 |