Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272809 | Technique for direct bonding cast and wrought materials | John M. Robertson, Robert W. Baumgarten, Ralph B. Bogard | 1993-12-28 |
| 4426000 | Slide holder for composite photographs and method of photographing slides | — | 1984-01-17 |