Inventor
Richard J. Shea
Inventor
Danvers, MA, US
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Jprimary
H01JElectric discharge tubes or discharge lamps38%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them25%
C03BManufacture, shaping, or supplementary processes13%
H01KElectric incandescent lamps13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
PatentTitleYear
4,648,850'Low-pressure arc discharge lamp having a common passageway and method of manufacturing same'19874,201,438'Spring contact for arc discharge tube base'19804,156,890'Flash assembly using elongated trigger bar'19794,084,112'Incandescent lamp having two-part insulative base'19784,023,893'Lamp and lens retrofit assembly for overhead projector'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1980Patents assigned to GTE SYLVANIA INC (4)· patent assignee history
1977Based in Hathorne, MA, US· patent location history
1978–1987Based in Danvers, MA, US· patent location history
1987Patents assigned to GTE PROD CORP (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| GTE SYLVANIA INC | 4 | 1977–1980 |
| GTE PROD CORP | 1 | 1987 |
Locations
| Location | Patents | Span |
|---|---|---|
| Danvers, Massachusetts, US | 4 | 1978–1987 |
| Hathorne, Massachusetts, US | 1 | 1977 |