Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6424481 | Five and one-quarter inch form factor combination DAT tape drive and cassette magazine loader | William Theobald, Kenneth C. Campbell, Roger M. Gray, Lyle J. Hedlund, Raymond D. Heistand, II +4 more | 2002-07-23 |
| 5402285 | Five and one-quarter inch form factor combination DAT tape drive and cassette magazine loader | William I. Theobald, Jr., Kenneth C. Campbell, Roger M. Gray, Lyle J. Hedlund, Raymond D. Heistand, II +4 more | 1995-03-28 |
| 5264974 | Cassette loading system | Kenneth C. Campbell, Haruhi Nakagawa, William Theobald | 1993-11-23 |