Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4472750 | Data record with pre-recorded transducer positioning signals, and system for utilizing same | Marlin K. Klumpp, Francis Lum, Samuel N. Irwin | 1984-09-18 |
| 4468712 | Positioner apparatus for tape recorder heads | Ronald G. Dawson, Samuel N. Irwin | 1984-08-28 |