Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5353112 | Optical inspection method and apparatus | — | 1994-10-04 |
| 5351117 | Sensing a narrow frequency band and gemstones | Andrew D. G. Stewart, Robin W. Smith, Martin Cooper, Christopher M. Welbourn, Paul Martyn Spear | 1994-09-27 |