Inventor
Lawrence P. Trubell
Inventor
Longmont, CO, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems33%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests33%
G05FSystems for regulating electric or magnetic variables17%
H05BElectric heating17%
PatentTitleYear
4,412,278'Ac-to-dc converter using polarized input isolation capacitors'19834,385,262'Method and apparatus for variable current control of a negative resistance device such as a fluorescent lamp'19834,025,863'Regulating electric power circuit arrangement'19773,965,408'Controlled ferroresonant transformer regulated power supply'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1983Patents assigned to IBM (4)· patent assignee history
1976–1977Based in San Jose, CA, US· patent location history
1983Based in Longmont, CO, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| IBM | 4 | 1976–1983 |
Locations
| Location | Patents | Span |
|---|---|---|
| Longmont, CO, US | 2 | 1983 |
| San Jose, California, US | 2 | 1976–1977 |