Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814899 | Tape transporting device | John E. Gantzhorn, Jr., Koichi Sota, Jun Taniguchi | 1989-03-21 |
| 4698701 | High speed thermomagnetic tape duplication | John E. Gantzhorn, Jr., Robert O. Uhler | 1987-10-06 |