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USPTO Patent Rankings Data through Dec 31, 2025
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Douglas E. Keiter — 14 Patents

CRCree: 6 patents #211 of 639Top 35%
SUSunpower: 5 patents #129 of 453Top 30%
ILIdeal Industries Lighting: 3 patents #59 of 178Top 35%
Apex, NC: #154 of 1,394 inventorsTop 15%
North Carolina: #3,601 of 45,564 inventorsTop 8%
Overall (All Time): #332,869 of 4,157,543Top 9%
14 Patents All Time
Douglas E. Keiter has been granted 14 US patents while listed as an inventor at Cree. The first was granted in 2001 and the most recent in April 2023. Douglas E. Keiter ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Douglas E. Keiter in Apex, NC, US.

Issued Patents All Time

Showing 1–14 of 14 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11635197 LED luminaire having enhanced thermal management Andrew Dan Bendtsen, Kurt S. Wilcox, Boris Karpichev, John Roberts, David P. Goelz +1 more 2023-04-25
11231170 LED luminaire having enhanced thermal management Andrew Dan Bendtsen, Kurt S. Wilcox, Boris Karpichev, John Roberts, David P. Goelz +1 more 2022-01-25
10724728 LED luminaire having enhanced thermal management Andrew Dan Bendtsen, Kurt S. Wilcox, Boris Karpichev, John Roberts, David P. Goelz +1 more 2020-07-28
10271390 Solid-state lighting fixture with compound semiconductor driver circuitry Yuequan Hu, Nicholas W. Medendorp, Jr. 2019-04-23 $9,011,000
10234127 LED luminaire having enhanced thermal management Andrew Dan Bendtsen, Kurt S. Wilcox, Boris Karpichev, John Roberts, David P. Goelz +1 more 2019-03-19 $11,980,000
10203103 LED luminaire having enhanced thermal management Andrew Dan Bendtsen, Kurt S. Wilcox, Boris Karpichev, John W. Durkee, John Roberts +2 more 2019-02-12 $14,174,000
D812805 Lighting apparatus Andrew Dan Bendtsen, Kurt S. Wilcox, Boris Karpichev, John Roberts, David P. Goelz +1 more 2018-03-13
9844107 High efficiency driver circuitry for a solid state lighting fixture Yuequan Hu, Nicholas W. Medendorp, Jr. 2017-12-12 $10,730,000
9288863 Lighting apparatus and methods using reconfigurable dimming mapping Michael B. Gilliom, Danwei Liu, Michael M. Walters 2016-03-15 $3,209,000
7633173 Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator Ezekiel S. Holliday 2009-12-15
7453241 Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator Ezekiel S. Holliday 2008-11-18
7266947 Temperature control for free-piston cryocooler with gas bearings Ezekiel S. Holliday 2007-09-11 $29,075,000
6536326 Control system and method for preventing destructive collisions in free piston machines Reuven Unger, Nicholas van der Walt 2003-03-25
6199381 DC centering of free piston machine Reuven Unger 2001-03-13