Inventor
David Douglas
Inventor
Oak Park, MI, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F21Sprimary
F21SNon-portable lighting devices18%
F21VFunctional features or details of lighting devices or systems thereof18%
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 emitted18%
F21KNon-electric light sources using luminescence12%
A47FSpecial furniture, fittings, or accessories for shops, storehouses, bars, restaurants or the like6%
F21WIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to uses or applications of lighting devices or systems6%
G02BOptical elements, systems or apparatus6%
G09FDisplaying6%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h106%
LOC266%
Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2011–2012Patents assigned to DOUGLAS DAVID E (2)· patent assignee history
2011–2016Patents assigned to STACK THOMAS E (2)· patent assignee history
2011Patents assigned to LEE SAMUEL S (1)· patent assignee history
2011–2019Based in Oak Park, MI, US· patent location history
2012–2016Patents assigned to TECHNOLOGY INC Q (2)· patent assignee history
2016–2019Patents assigned to DOUGLAS DAVID (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DOUGLAS DAVIDself | 2 | 2016–2019 |
| DOUGLAS DAVID Eself | 2 | 2011–2012 |
| STACK THOMAS E | 2 | 2011–2016 |
| TECHNOLOGY INC Q | 2 | 2012–2016 |
| LEE SAMUEL S | 1 | 2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Oak Park, MI, US | 4 | 2011–2019 |