Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4788702 | Orientation of crystals | Donald Rogers | 1988-11-29 |
| 4771446 | Grading orientation errors in crystal specimens | Donald Rogers | 1988-09-13 |
| 4710259 | Setting the orientation of crystals | Donald Rogers | 1987-12-01 |
| 4247798 | Mercury-metal halide discharge lamp | Barry Preston, Robert B. Page | 1981-01-27 |