Krohn; David A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Krohn; David A..The latest application filed is for "method and system for selecting a displayed character using an input device".
- Krohn; David A. - Chicago IL
- Krohn; David A. - Hamden CT
- Krohn; David A. - Southbridge MA
| Patent | Date |
|---|---|
| Method and system for selecting a displayed character using an input device Grant 6,593,913 - Krohn , et al. July 15, 2 | 2003-07-15 |
| Optical fiber element having a permanent protective coating with a Shore D hardness value of 65 or more Grant 5,381,504 - Novack , et al. January 10, 1 | 1995-01-10 |
| Low loss infrared transmitting hollow core optical fiber method of manufacture Grant 5,221,308 - Krohn , et al. June 22, 1 | 1993-06-22 |
| Optoelectronic rotational position sensor Grant 4,698,616 - Krohn , et al. October 6, 1 | 1987-10-06 |
| Optoelectronic rotational position sensor Grant 4,679,029 - Krohn , et al. July 7, 1 | 1987-07-07 |
| Liquid level sensor Grant 4,606,226 - Krohn August 19, 1 | 1986-08-19 |
| Method and components for remote reading of utility meters Grant 4,500,870 - Krohn , et al. February 19, 1 | 1985-02-19 |
| Low loss optical fibers Grant 4,289,516 - Krohn September 15, 1 | 1981-09-15 |
| Method of manufacturing graded index optical fibers Grant 4,277,271 - Krohn July 7, 1 | 1981-07-07 |
| Method of manufacturing graded index optical fibers Grant 4,163,654 - Krohn , et al. August 7, 1 | 1979-08-07 |
| Photochromic gradient lenses Grant 4,101,302 - Krohn , et al. * July 18, 1 | 1978-07-18 |
| Ophthalmic lens with locally variable index of refraction and method of making same Grant 4,073,579 - Deeg , et al. February 14, 1 | 1978-02-14 |
| High strength ophthalmic lens Grant 4,042,405 - Krohn , et al. August 16, 1 | 1977-08-16 |
| Method of making artificial intraocular lenses with holes Grant 4,015,965 - Deeg , et al. April 5, 1 | 1977-04-05 |
| High strength ophthalmic lens Grant 4,012,131 - Krohn , et al. March 15, 1 | 1977-03-15 |
| High strength ophthalmic lens Grant 3,997,250 - Krohn , et al. December 14, 1 | 1976-12-14 |
| Artificial intraocular lens Grant 3,996,627 - Deeg , et al. December 14, 1 | 1976-12-14 |
| Faraday rotation glasses Grant 3,935,020 - Deeg , et al. January 27, 1 | 1976-01-27 |
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