Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4301486 | System for recording information on a flexible information storage media | William David Autery, Alan H. Rittman, Nelson Chapman | 1981-11-17 |
| 4296448 | Recording cartridge having a flat smoothing plane with a raised portion | Felix Garcia, Jr., Roger A. Hergert, Don C. Mann | 1981-10-20 |
| 4291353 | System and method for cleaning a magnetic head transducer | Robert L. Fletcher, Richard D. VanLandingham, Alan H. Rittman | 1981-09-22 |