Inventor
David G. Freier
Inventor
St. Paul, MN, US
Overview
Patents· 37 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus25%
F21VFunctional features or details of lighting devices or systems thereof15%
F21SNon-portable lighting devices10%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein7%
F21YIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to the form or the kind of the light sources or of the colour of the light emitted5%
G09FDisplaying5%
B82YSpecific uses or applications of nanostructures3%
F21WIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to uses or applications of lighting devices or systems3%
H01LSemiconductor devices3%
H10KOrganic electric solid-state devices3%
PatentTitleYear
10,991,765Optical stack for improved color uniformity in OLED display202110,756,306Nanostructured article202010,566,391OLED display with improved color uniformity20209,976,714Luminaire for crosswalk, method for making, and method for controlling20189,791,128'Curved light duct extraction'20179,683,718'Light duct elbow for ducted illumination'20179,551,827'Hollow light duct bend'20179,476,554'Rectangular light duct extraction'20169,464,773'Illuminated light duct joint'20169,360,676'Light duct tee splitter'20169,353,930'Light duct tee extractor'20169,335,015'Off-axis cassegrain solar collector'2016D0752773'Bollard luminaire window'20169,222,650'Switchable light-duct extraction'20159,091,408'Recycling backlights with semi-specular components'20159,039,245'Energy efficient sign'20159,028,108'Collimating light injectors for edge-lit backlights'20158,926,159'Thin hollow backlights with beneficial design characteristics'20158,848,132'Hollow backlight with structured films'20148,801,207'Light directing sign substrate'20148,794,809'Light injection coupler for coupling light guides'20148,743,462'Concentrating daylight collector'20148,740,442'Backlight and display system using same'20148,608,363'Recycling backlights with semi-specular components'20138,596,809'Suspended optical film'20138,523,419'Thin hollow backlights with beneficial design characteristics'20138,469,575'Backlight and display system using same'20138,251,527'Light duct bend'20128,192,048'Lighting assemblies and systems'20128,098,434'Optical decollimator for daylighting systems'20127,898,520'Method and apparatus for backlight simulation'20117,801,716'Computerized modeling for design and evaluation of organic light emitting diodes'20106,641,880'Signage having films to reduce power consumption and improve luminance uniformity and method for using same'20036,416,201'Illuminated sign with lamp masks for uniform illumination'20026,301,418'Optical waveguide with diffuse light extraction'20016,282,821'Low-loss face diffuser films for backlit signage and methods for using same'20016,123,442'Articles with diffuse reflection of light from light fibers'2000Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2000–2021Based in St. Paul, MN, US· patent location history
2001–2021Patents assigned to 3M INNOVATIVE PROPERTIES CO (36)· patent assignee history
2012–2016Patents assigned to FREIER DAVID G (16)· patent assignee history
2012–2015Patents assigned to BIERNATH ROLF W (6)· patent assignee history
2012–2015Patents assigned to MEIS MICHAEL A (4)· patent assignee history
2013Patents assigned to WHEATLEY JOHN A (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| 3M INNOVATIVE PROPERTIES CO | 36 | 2001–2021 |
| FREIER DAVID Gself | 16 | 2012–2016 |
| BIERNATH ROLF W | 6 | 2012–2015 |
| MEIS MICHAEL A | 4 | 2012–2015 |
| WHEATLEY JOHN A | 4 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| St. Paul, Minnesota, US | 37 | 2000–2021 |