Eckhardt; Stephen K.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Eckhardt; Stephen K..The latest application filed is for "light assembly".
- Eckhardt; Stephen K. - White Bear Lake MN
- Eckhardt; Stephen K. - Austin TX
| Patent | Date |
|---|---|
| Light assembly Grant 9,816,679 - Eckhardt , et al. November 14, 2 | 2017-11-14 |
| Light Assembly App 20160047521 - Eckhardt; Stephen K. ; et al. | 2016-02-18 |
| Panoramic optical systems Grant 9,229,200 - Eckhardt January 5, 2 | 2016-01-05 |
| Light assembly Grant 9,200,775 - Eckhardt , et al. December 1, 2 | 2015-12-01 |
| Backlight reflectors having a prismatic structure Grant 8,721,153 - Kinder , et al. May 13, 2 | 2014-05-13 |
| Apparatus for measuring the retroreflectance of materials Grant 8,675,194 - Eckhardt , et al. March 18, 2 | 2014-03-18 |
| Panoramic Optical Systems App 20140022649 - Eckhardt; Stephen K. | 2014-01-23 |
| Apparatus For Measuring The Retroreflectance Of Materials App 20120287432 - Eckhardt; Stephen K. ; et al. | 2012-11-15 |
| Light Assembly App 20120039084 - Eckhardt; Stephen K. ; et al. | 2012-02-16 |
| Backlight Reflectors Having A Prismatic Structure App 20110032727 - Kinder; Brian A. ; et al. | 2011-02-10 |
| Microreplicated achromatic lens Grant 7,804,649 - Eckhardt , et al. September 28, 2 | 2010-09-28 |
| Fresnel field lens Grant 7,684,126 - Eckhardt March 23, 2 | 2010-03-23 |
| Polarizing beamsplitter assembly Grant 7,475,991 - Ma , et al. January 13, 2 | 2009-01-13 |
| Color-splitting optical element and an optical system utilizing the color-splitting optical element Grant 7,411,734 - Magarill , et al. August 12, 2 | 2008-08-12 |
| Projection system having low astigmatism Grant 7,329,006 - Aastuen , et al. February 12, 2 | 2008-02-12 |
| Fresnel Field Lens App 20070201148 - Eckhardt; Stephen K. | 2007-08-30 |
| Polarizing beamsplitter assembly App 20070146644 - Ma; Jiaying ; et al. | 2007-06-28 |
| Color-splitting optical element and an optical system utilizing the color-splitting optical element App 20070103788 - Magarill; Simon ; et al. | 2007-05-10 |
| Projection illumination system with tunnel integrator and field lens Grant 7,152,981 - Eckhardt December 26, 2 | 2006-12-26 |
| Compound polarization beam splitters Grant 6,976,759 - Magarill , et al. December 20, 2 | 2005-12-20 |
| Microreplicated achromatic lens App 20050207031 - Eckhardt, Stephen K. ; et al. | 2005-09-22 |
| Compound polarization beam splitters App 20050140932 - Magarill, Simon ; et al. | 2005-06-30 |
| Projection illumination system with tunnel integrator and field lens App 20050140940 - Eckhardt, Stephen K. | 2005-06-30 |
| Projection illumination system with tunnel integrator and field lens Grant 6,857,752 - Eckhardt February 22, 2 | 2005-02-22 |
| Compound polarization beam splitters App 20040233393 - Magarill, Simon ; et al. | 2004-11-25 |
| Projection illumination system with tunnel integrator and field lens App 20040201829 - Eckhardt, Stephen K. | 2004-10-14 |
| Projection system having low astigmatism App 20040130681 - Aastuen, David J.W. ; et al. | 2004-07-08 |
| Compound polarization beam splitters Grant 6,719,426 - Magarill , et al. April 13, 2 | 2004-04-13 |
| Polarizing beam splitter Grant 6,721,096 - Bruzzone , et al. April 13, 2 | 2004-04-13 |
| Projection system having low astigmatism Grant 6,672,721 - Aastuen , et al. January 6, 2 | 2004-01-06 |
| Compound polarization beam splitters App 20030210379 - Magarill, Simon ; et al. | 2003-11-13 |
| Polarizing beam splitter App 20030184864 - Bruzzone, Charles L. ; et al. | 2003-10-02 |
| Projection system having low astigmatism App 20030038923 - Aastuen, David J. W. ; et al. | 2003-02-27 |
| Reflective LCD projection system using wide-angle Cartesian polarizing beam splitter Grant 6,486,997 - Bruzzone , et al. November 26, 2 | 2002-11-26 |
| Reflective LCD projection system using wide-angle cartesian polarizing beam splitter and color separation and recombination prisms App 20020109795 - Bruzzone, Charles L. ; et al. | 2002-08-15 |
| High efficiency polarization converter including input and output lenslet arrays Grant 6,104,536 - Eckhardt August 15, 2 | 2000-08-15 |
| Dual grooved Fresnel lens for overhead projection Grant 5,803,568 - Eckhardt September 8, 1 | 1998-09-08 |
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