Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888654 | Method of writing and reading digital data interspersed with analog audio frequency data on magnetic recording tape | — | 1989-12-19 |
| 4663678 | System for writing and reading digital data interspersed with analog audio frequency data on magnetic recording tape | — | 1987-05-05 |
| 4654727 | Videocassette handling and sequencing system | Timothy L. Crabtree, Robert Fairchild | 1987-03-31 |
| 4224644 | Method and apparatus for controlling a tape player/recorder for retrieving and playing prerecorded information | David E. Lewis | 1980-09-23 |