Inventor
Donald L. Cullen
Inventor
Columbus, OH, US
Overview
Patents· 6 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus25%
G03HHolographic processes or apparatus25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges10%
G01BMeasuring length, thickness or similar linear dimensions5%
G09FDisplaying5%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers5%
PatentTitleYear
6,898,009'Diffractive display'20056,621,607'Diffractive display'20036,552,831'Active and passive holographic optical based curved surface element'20036,285,472'Active and passive holographic optical based curved surface elements'20015,613,022'Diffractive display and method utilizing reflective or transmissive light yielding single pixel full color capability'19974,438,402'Electrostatic transducer for length measurement system'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984Patents assigned to AUTECH CORP (1)· patent assignee history
1984Based in Worthington, OH, US· patent location history
1997–2005Patents assigned to LUCKOFF DISPLAY CORP (5)· patent assignee history
1997–2005Based in Columbus, OH, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| LUCKOFF DISPLAY CORP | 5 | 1997–2005 |
| AUTECH CORP | 1 | 1984 |
Locations
| Location | Patents | Span |
|---|---|---|
| Columbus, OH, US | 5 | 1997–2005 |
| Worthington, OH, US | 1 | 1984 |