Withrington; Roger J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Withrington; Roger J..The latest application filed is for "method and laser beam directing system with rotatable diffraction gratings".
- Withrington; Roger J. - Los Angeles CA
| Patent | Date |
|---|---|
| Method and laser beam directing system with rotatable diffraction gratings Grant 6,792,028 - Cook , et al. September 14, 2 | 2004-09-14 |
| Method and laser beam directing system with rotatable diffraction gratings App 20030179804 - Cook, Lacy G. ; et al. | 2003-09-25 |
| Method for fabrication of low efficiency diffraction gratings and product obtained thereby Grant 4,828,356 - Hobrock , et al. May 9, 1 | 1989-05-09 |
| Holographic head-up displays Grant 4,218,111 - Withrington , et al. August 19, 1 | 1980-08-19 |
| Optical display systems utilizing holographic lenses Grant 3,940,204 - Withrington February 24, 1 | 1976-02-24 |
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