Heffner, William R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Heffner, William R..The latest application filed is for "a structure for forming a laser circuit having low penetration ohmic contact providing impurity gettering and the resultant laser circuit".
- Heffner, William R. - Sinking Spring PA
- Heffner; William R. - Plainfield NJ
| Patent | Date |
|---|---|
| A structure for forming a laser circuit having low penetration ohmic contact providing impurity gettering and the resultant laser circuit App 20040217475 - Derkits, Gustav E. JR. ; et al. | 2004-11-04 |
| A Structure For Forming A Laser Circuit Having Low Penetration Ohmic Contact Providing Impurity Gettering And The Resultant Laser Circuit App 20030141599 - Derkits, Gustav E. JR. ; et al. | 2003-07-31 |
| Method of forming a laser circuit having low penetration ohmic contact providing impurity gettering and the resultant laser circuit Grant 6,555,457 - Derkits, Jr. , et al. April 29, 2 | 2003-04-29 |
| Matrix addressed bistable liquid crystal display Grant 4,529,271 - Berreman , et al. July 16, 1 | 1985-07-16 |
| Bistable liquid crystal twist cell Grant 4,505,548 - Berreman , et al. March 19, 1 | 1985-03-19 |
| Bistable liquid crystal twist cell Grant 4,239,345 - Berreman , et al. December 16, 1 | 1980-12-16 |
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