Engstrom; Frederic R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Engstrom; Frederic R..The latest application filed is for "total internal reflection fresnel lens and optical system using the same".
- Engstrom; Frederic R. - Hillsboro OR
| Patent | Date |
|---|---|
| Total internal reflection Fresnel lens and optical system using the same Grant 7,350,925 - Engstrom April 1, 2 | 2008-04-01 |
| Swept illumination to reduce LCD lag in front and rear projection displays Grant 7,196,687 - Conner , et al. March 27, 2 | 2007-03-27 |
| Contrast and brightness enhancing apertures for illumination displays Grant 7,029,130 - Cannon , et al. April 18, 2 | 2006-04-18 |
| Total internal reflection fresnel lens and optical system using the same App 20060050241 - Engstrom; Frederic R. | 2006-03-09 |
| Contrast and brightness enhancing apertures for illumination displays App 20050140933 - Cannon, Bruce L. ; et al. | 2005-06-30 |
| Swept illumination to reduce LCD lag in front and rear projection displays App 20040135754 - Conner, Arlie R. ; et al. | 2004-07-15 |
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