Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5226091 | Method and apparatus for capturing information in drawing or writing | David Nicholas Lloyd Howell, Colin S. Hilton, John Bridle, Martin J. Russell | 1993-07-06 |
| 4899972 | Anchoring | Ernest Cranko | 1990-02-13 |
| 4896416 | Anchoring method | Ernest Cranko | 1990-01-30 |
| 4842063 | Anchoring method and capsule therefor | John A. Coetzee, Ernest Cranko | 1989-06-27 |