Hovey; Richard J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hovey; Richard J..The latest application filed is for "method of a single element complete air filtering structure for a respirator filter cartridge".
- Hovey; Richard J. - Sturbridge MA
| Patent | Date |
|---|---|
| Method of a single element complete air filtering structure for a respirator filter cartridge Grant 4,383,956 - Croft , et al. May 17, 1 | 1983-05-17 |
| Stabilized photochromic materials Grant 4,367,170 - Uhlmann , et al. January 4, 1 | 1983-01-04 |
| Photochromic compounds Grant 4,342,668 - Hovey , et al. * August 3, 1 | 1982-08-03 |
| Gradient photochromic lens and method selectively reducing photochromic activity Grant 4,289,497 - Hovey September 15, 1 | 1981-09-15 |
| Photochromic compounds Grant 4,215,010 - Hovey , et al. July 29, 1 | 1980-07-29 |
| Stabilized photochromic materials Grant 4,166,043 - Uhlmann , et al. August 28, 1 | 1979-08-28 |
| Photochromic plastic material Grant 4,110,244 - Hovey August 29, 1 | 1978-08-29 |
| Photochromic plastic materials Grant 4,049,846 - Hovey September 20, 1 | 1977-09-20 |
| Stabilized photochromic materials Grant 4,046,586 - Uhlmann , et al. September 6, 1 | 1977-09-06 |
| Photochromic light valve Grant 4,043,637 - Hovey August 23, 1 | 1977-08-23 |
| Stabilized photochromic materials Grant 4,012,232 - Uhlmann , et al. March 15, 1 | 1977-03-15 |
| Soft Contact Lens And Method Of Production Thereof Grant 3,839,304 - Hovey October 1, 1 | 1974-10-01 |
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