Inventor
Raymond E. Callahan, Jr.
Inventor
Torrance, CA, US
Overview
Patents· 3 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Bprimary
G03BApparatus or arrangements for taking photographs or for projecting or viewing them33%
H01JElectric discharge tubes or discharge lamps33%
H04SStereophonic systems33%
PatentTitleYear
7,397,049'Determining ion beam parallelism using refraction method'20086,624,873'Matrix-encoded surround-sound channels in a discrete digital sound format'20035,639,585'System for photographically recording digital data and analog soundtrack, and medium having digital data and analog soundtrack recorded thereon'1997Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1997Patents assigned to SONY CINEMA PRODUCTS CORP (1)· patent assignee history
1997Patents assigned to SONY CORP (1)· patent assignee history
1997–2003Based in Torrance, CA, US· patent location history
2003Patents assigned to DOLBY LAB LICENSING CORP (1)· patent assignee history
2008Patents assigned to VARIAN SEMICONDUCTOR EQUIPMENT (1)· patent assignee history
2008Based in Gloucester, MA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DOLBY LAB LICENSING CORP | 1 | 2003 |
| SONY CINEMA PRODUCTS CORP | 1 | 1997 |
| SONY CORP | 1 | 1997 |
| VARIAN SEMICONDUCTOR EQUIPMENT | 1 | 2008 |
Locations
| Location | Patents | Span |
|---|---|---|
| Torrance, California, US | 2 | 1997–2003 |
| Gloucester, Massachusetts, US | 1 | 2008 |