Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4647994 | Miniaturized cartridge-type tape drive for data processors | Francis Lum, Michael L. Bolt, Steven E. Henke, Edmund L. Sokolik, John M. Chambors | 1987-03-03 |
| 4472750 | Data record with pre-recorded transducer positioning signals, and system for utilizing same | Marlin K. Klumpp, Joseph H. Mueller, Francis Lum | 1984-09-18 |
| 4468712 | Positioner apparatus for tape recorder heads | Joseph H. Mueller, Ronald G. Dawson | 1984-08-28 |
| 4462053 | Method for controlling a disc head | Francis Lum, Bruce D. Graham, Juan F. Velazquez | 1984-07-24 |
| D270348 | Integrated disc and tape recorder drive unit | Otto R. Butsch, Francis Lum, Juan F. Velazquez | 1983-08-30 |
| D270055 | Combined disc and tape drive | Otto R. Butsch, Francis Lum, Juan F. Velazquez | 1983-08-09 |