Inventor
Douglas E. Keiter
Inventor
Apex, NC, US
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H05Bprimary
H05BElectric heating13%
F02GHot gas or combustion-product positive-displacement engine plants9%
F21SNon-portable lighting devices9%
F21VFunctional features or details of lighting devices or systems thereof9%
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 emitted9%
F01BMachines or engines, in general or of positive-displacement type, e.g. steam engines7%
F25BRefrigeration machines, plants or systems7%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications7%
F02BInternal-combustion piston engines4%
F02DControlling combustion engines4%
PatentTitleYear
10,724,728LED luminaire having enhanced thermal management202010,271,390Solid-state lighting fixture with compound semiconductor driver circuitry201910,234,127LED luminaire having enhanced thermal management201910,203,103LED luminaire having enhanced thermal management2019D0812805'Lighting apparatus'20189,844,107'High efficiency driver circuitry for a solid state lighting fixture'20179,288,863'Lighting apparatus and methods using reconfigurable dimming mapping'20167,633,173'Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator'20097,453,241'Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator'20087,266,947'Temperature control for free-piston cryocooler with gas bearings'20076,536,326'Control system and method for preventing destructive collisions in free piston machines'20036,199,381'DC centering of free piston machine'2001Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2001–2009Patents assigned to SUNPOWER INC (5)· patent assignee history
2001–2009Based in Athens, OH, US· patent location history
2016–2019Patents assigned to CREE INC (6)· patent assignee history
2016–2020Based in Apex, NC, US· patent location history
2020Patents assigned to IDEAL IND LIGHTING LLC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CREE INC | 6 | 2016–2019 |
| SUNPOWER INC | 5 | 2001–2009 |
| IDEAL IND LIGHTING LLC | 1 | 2020 |
Locations
| Location | Patents | Span |
|---|---|---|
| Apex, NC, US | 7 | 2016–2020 |
| Athens, OH, US | 5 | 2001–2009 |