Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5619306 | Apparatus for duplicating X-ray type photographic films | Donald J. Wanek, Arthur Hamburgen | 1997-04-08 |
| 5360651 | Optical disk having R/W and worm area | Leon E. Gregg, William Jaaskelainen, Jr. | 1994-11-01 |
| 4631706 | System for preventing the overwriting of previously optically recorded data and for reading optically recorded data during writing | Glenn Darrell Batalden, Neil R. Davie | 1986-12-23 |
| 4488189 | Sector servo seek control | Frederick E. Axmear, John H. Saxman, Michael M. Siverling | 1984-12-11 |
| 4371902 | Disk initialization method | Joseph L. Evjen, Jr., William C. Hoveland, Roy A. Roble, Donald R. Smith, John H. Wirz | 1983-02-01 |