Stephen K. Eckhardt

Person

White Bear Lake, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Light assembly
- Patent number 9,816,679
- Issue date Nov 14, 2017
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Panoramic optical systems
- Patent number 9,229,200
- Issue date Jan 5, 2016
- EyeSee360, Inc.
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Light assembly
- Patent number 9,200,775
- Issue date Dec 1, 2015
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- F21 - LIGHTING
Information Patent Grant
Backlight reflectors having a prismatic structure
- Patent number 8,721,153
- Issue date May 13, 2014
- 3M Innovative Properties Company
- Brian A. Kinder
- G02 - OPTICS
Information Patent Grant
Apparatus for measuring the retroreflectance of materials
- Patent number 8,675,194
- Issue date Mar 18, 2014
- Gamma Scientific Inc.
- Stephen K. Eckhardt
- G01 - MEASURING TESTING
Information Patent Grant
Microreplicated achromatic lens
- Patent number 7,804,649
- Issue date Sep 28, 2010
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Fresnel field lens
- Patent number 7,684,126
- Issue date Mar 23, 2010
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Polarizing beamsplitter assembly
- Patent number 7,475,991
- Issue date Jan 13, 2009
- 3M Innovative Properties Company
- Jiaying Ma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Color-splitting optical element and an optical system utilizing the...
- Patent number 7,411,734
- Issue date Aug 12, 2008
- 3M Innovative Properties Company
- Simon Magarill
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Projection system having low astigmatism
- Patent number 7,329,006
- Issue date Feb 12, 2008
- 3M Innovative Properties Company
- David J. W. Aastuen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Projection illumination system with tunnel integrator and field lens
- Patent number 7,152,981
- Issue date Dec 26, 2006
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Compound polarization beam splitters
- Patent number 6,976,759
- Issue date Dec 20, 2005
- 3M Innovative Properties Company
- Simon Magarill
- G02 - OPTICS
Information Patent Grant
Projection illumination system with tunnel integrator and field lens
- Patent number 6,857,752
- Issue date Feb 22, 2005
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Polarizing beam splitter
- Patent number 6,721,096
- Issue date Apr 13, 2004
- 3M Innovative Properties Company
- Charles L. Bruzzone
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Compound polarization beam splitters
- Patent number 6,719,426
- Issue date Apr 13, 2004
- 3M Innovative Properties Company
- Simon Magarill
- G02 - OPTICS
Information Patent Grant
Projection system having low astigmatism
- Patent number 6,672,721
- Issue date Jan 6, 2004
- 3M Innovative Properties Company
- David J. W. Aastuen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Reflective LCD projection system using wide-angle Cartesian polariz...
- Patent number 6,486,997
- Issue date Nov 26, 2002
- 3M Innovative Properties Company
- Charles L. Bruzzone
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
High efficiency polarization converter including input and output l...
- Patent number 6,104,536
- Issue date Aug 15, 2000
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Dual grooved Fresnel lens for overhead projection
- Patent number 5,803,568
- Issue date Sep 8, 1998
- Minnesota Mining and Manufacturing Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Fixed-focus triplet projection lens for overhead projectors
- Patent number 5,596,455
- Issue date Jan 21, 1997
- Minnesota Mining and Manufacturing Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Condensers for illumination systems
- Patent number 5,515,123
- Issue date May 7, 1996
- Minnesota Mining and Manufacturing Company
- Dwight G. Baldwin
- G02 - OPTICS
Information Patent Grant
Condensers for overhead projectors
- Patent number 5,475,535
- Issue date Dec 12, 1995
- Minnesota Mining and Manufacturing Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Grant
Condensers for overhead projectors
- Patent number 5,400,094
- Issue date Mar 21, 1995
- Minnesota Mining and Manufacturing Company
- Stephen K. Eckhardt
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Methods and apparatus for reflected display of images
- Publication number 20160195723
- Publication date Jul 7, 2016
- Seebright Inc.
- John Murray
- G02 - OPTICS
Information Patent Application
LIGHT ASSEMBLY
- Publication number 20160047521
- Publication date Feb 18, 2016
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- F21 - LIGHTING
Information Patent Application
PANORAMIC OPTICAL SYSTEMS
- Publication number 20140022649
- Publication date Jan 23, 2014
- EyeSee360, Inc.
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Application
APPARATUS FOR MEASURING THE RETROREFLECTANCE OF MATERIALS
- Publication number 20120287432
- Publication date Nov 15, 2012
- Stephen K. Eckhardt
- G01 - MEASURING TESTING
Information Patent Application
LIGHT ASSEMBLY
- Publication number 20120039084
- Publication date Feb 16, 2012
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Application
BACKLIGHT REFLECTORS HAVING A PRISMATIC STRUCTURE
- Publication number 20110032727
- Publication date Feb 10, 2011
- Brian A. Kinder
- G02 - OPTICS
Information Patent Application
Fresnel Field Lens
- Publication number 20070201148
- Publication date Aug 30, 2007
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Application
Polarizing beamsplitter assembly
- Publication number 20070146644
- Publication date Jun 28, 2007
- Jiaying Ma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Color-splitting optical element and an optical system utilizing the...
- Publication number 20070103788
- Publication date May 10, 2007
- 3M Innovative Properties Company
- Simon Magarill
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Microreplicated achromatic lens
- Publication number 20050207031
- Publication date Sep 22, 2005
- Stephen K. Eckhardt
- G02 - OPTICS
Information Patent Application
Compound polarization beam splitters
- Publication number 20050140932
- Publication date Jun 30, 2005
- 3M Innovative Properties Company
- Simon Magarill
- G02 - OPTICS
Information Patent Application
Projection illumination system with tunnel integrator and field lens
- Publication number 20050140940
- Publication date Jun 30, 2005
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Compound polarization beam splitters
- Publication number 20040233393
- Publication date Nov 25, 2004
- 3M Innovative Properties Company
- Simon Magarill
- G02 - OPTICS
Information Patent Application
Projection illumination system with tunnel integrator and field lens
- Publication number 20040201829
- Publication date Oct 14, 2004
- 3M Innovative Properties Company
- Stephen K. Eckhardt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Projection system having low astigmatism
- Publication number 20040130681
- Publication date Jul 8, 2004
- 3M Innovative Properties Company
- David J. W. Aastuen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Compound polarization beam splitters
- Publication number 20030210379
- Publication date Nov 13, 2003
- Simon Magarill
- G02 - OPTICS
Information Patent Application
Polarizing beam splitter
- Publication number 20030184864
- Publication date Oct 2, 2003
- 3M Innovative Properties Company
- Charles L. Bruzzone
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
Projection system having low astigmatism
- Publication number 20030038923
- Publication date Feb 27, 2003
- 3M Innovative Properties Company
- David J. W. Aastuen
- G02 - OPTICS
Information Patent Application
Reflective LCD projection system using wide-angle cartesian polariz...
- Publication number 20020109795
- Publication date Aug 15, 2002
- Charles L. Bruzzone
- G02 - OPTICS

Stephen K. Eckhardt

Person

Patents Grantslast 30 patents

Light assembly

Panoramic optical systems

Light assembly

Backlight reflectors having a prismatic structure

Apparatus for measuring the retroreflectance of materials

Microreplicated achromatic lens

Fresnel field lens

Polarizing beamsplitter assembly

Color-splitting optical element and an optical system utilizing the...

Projection system having low astigmatism

Projection illumination system with tunnel integrator and field lens

Compound polarization beam splitters

Projection illumination system with tunnel integrator and field lens

Polarizing beam splitter

Compound polarization beam splitters

Projection system having low astigmatism

Reflective LCD projection system using wide-angle Cartesian polariz...

High efficiency polarization converter including input and output l...

Dual grooved Fresnel lens for overhead projection

Fixed-focus triplet projection lens for overhead projectors

Condensers for illumination systems

Condensers for overhead projectors

Condensers for overhead projectors

Patents Applicationslast 30 patents

Methods and apparatus for reflected display of images

LIGHT ASSEMBLY

PANORAMIC OPTICAL SYSTEMS

APPARATUS FOR MEASURING THE RETROREFLECTANCE OF MATERIALS

LIGHT ASSEMBLY

BACKLIGHT REFLECTORS HAVING A PRISMATIC STRUCTURE

Fresnel Field Lens

Polarizing beamsplitter assembly

Color-splitting optical element and an optical system utilizing the...

Microreplicated achromatic lens

Compound polarization beam splitters

Projection illumination system with tunnel integrator and field lens

Compound polarization beam splitters

Projection illumination system with tunnel integrator and field lens

Projection system having low astigmatism

Compound polarization beam splitters

Polarizing beam splitter

Projection system having low astigmatism

Reflective LCD projection system using wide-angle cartesian polariz...