Inventor
Gerald E. Duffy
Inventor
Portland, OR, US
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Jprimary
H01JElectric discharge tubes or discharge lamps20%
H05BElectric heating15%
F21SNon-portable lighting devices10%
G01RMeasuring electric variables10%
G06FElectric digital data processing10%
H04NPictorial communication, e.g. television10%
G06KGraphical data reading5%
G06VImage or video recognition or understanding5%
G08BSignalling systems, e.g. personal calling systems5%
G09GArrangements or circuits for control of indicating devices using static means to present variable information5%
PatentTitleYear
11,062,580Methods and systems for updating an event timeline with event indicators20217,091,670'Safety interlock apparatus and method'20066,853,152'Electric power supply safety interlock system'20056,424,097'Projection lamp safety interlock apparatus and method'20025,793,352'Source coupler for multimedia projection display system'19985,719,463'Retaining spring and stop means for lamp mount'19985,594,294'Lamp assembly with a resilient retaining lamp mount structure'19975,479,102'Simulated load circuit for simulating the arc impedance of an electrodless discharge lamp'19955,332,970'Method for measuring the impedance of an electrodeless arc discharge lamp'19945,204,578'Heat sink means for metal halide lamp'19935,107,165'Initial light output for metal halide lamp'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–1998Patents assigned to GEN ELECTRIC (6)· patent assignee history
1992–1995Based in Mentor, OH, US· patent location history
1997–1998Based in University Heights, OH, US· patent location history
1998Patents assigned to IN FOCUS SYSTEMS INC (1)· patent assignee history
1998–2006Based in Portland, OR, US· patent location history
2002–2006Patents assigned to INFOCUS CORP (3)· patent assignee history
2021Patents assigned to GOOGLE LLC (1)· patent assignee history
2021Based in San Francisco, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| GEN ELECTRIC | 6 | 1992–1998 |
| INFOCUS CORP | 3 | 2002–2006 |
| GOOGLE LLC | 1 | 2021 |
| IN FOCUS SYSTEMS INC | 1 | 1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Portland, OR, US | 4 | 1998–2006 |
| Mentor, OH, US | 4 | 1992–1995 |
| University Heights, OH, US | 2 | 1997–1998 |
| San Francisco, California, US | 1 | 2021 |