Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6707045 | Detector for ionising radiation | Ricardo Simon Sussmann, Geoffrey Alan Scarsbrook | 2004-03-16 |
| 6493499 | Waveguide window | John Robert Brandon, Christopher William Ogilvie Thompson, Ricardo Simon Sussmann | 2002-12-10 |
| 6391215 | Diamond marking | James Gordon Charters Smith | 2002-05-21 |
| 5351117 | Sensing a narrow frequency band and gemstones | Robin W. Smith, Martin P. Smith, Martin Cooper, Christopher M. Welbourn, Paul Martyn Spear | 1994-09-27 |
| 5248877 | Making an elongate cut using high energy radiation | Martin Cooper | 1993-09-28 |
| 5206699 | Sensing a narrow frequency band of radiation and gemstones | Robin W. Smith, Martin P. Smith, Daniel J. Brink, Martin Cooper, Christopher M. Welbourn +1 more | 1993-04-27 |
| 4916391 | LVDT displacement sensor with signal noise reduction for use in weighing apparatus | Eryk Stefan Doerman, William Turner, David A. Homer, Ian Clarke | 1990-04-10 |
| 4696358 | Weighing a number of objects in succession | Eryk Stefan Doerman, William Turner, David A. Homer, Ian Clarke | 1987-09-29 |
| 4645922 | Integrating sphere arrangement for producing size-corrected color signals | Christopher M. Welbourn, Martin P. Smith | 1987-02-24 |
| 4529305 | Examining a gemstone | Walter T. Welford, John S. Dodson | 1985-07-16 |
| 4461568 | Assessing the color of gemstones and the like | Christopher M. Welbourn, Robert W. Ditchburn | 1984-07-24 |
| 4417564 | Centering and working gemstones | John C. Lawrence, John S. Dodson | 1983-11-29 |