Inventor
Charles A. Clark, Jr.
Inventor
Chatsworth, CA, US
Overview
Patents· 18 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 systems17%
G01SRadio direction-finding14%
G05FSystems for regulating electric or magnetic variables7%
H03KPulse technique7%
Y02ATechnologies for adaptation to climate change7%
B23KSoldering or unsoldering3%
C22CAlloys3%
G05BControl or regulating systems in general3%
G07CTime or attendance registers3%
G09BEducational or demonstration appliances3%
PatentTitleYear
5,164,157'Copper based alloy'19925,083,003'Adaptive stepper'19924,910,659'Input and output peripheral controller cards for use in a programmable logic controller system'1990D0294664'Shower seat'19884,649,385'Electronic locating system for persons receiving telephone calls'19874,605,890'Synchro power amplifier and control circuit for automatically tuning an inductive load'19864,415,960'Line variable overcurrent protection for a voltage conversion circuit'19834,390,937'Self-starting transformer-coupled FET multivibrators'19834,327,405'Voltage suppression circuit for a DC-to-DC voltage converter circuit'1982D0263677'Paint brush extension clamp'19824,323,957'Voltage supression circuit for a voltage converter circuit'19824,308,576'Overload protection for a voltage conversion circuit'19814,270,157'Power supply protection circuit'19814,270,127'Digital data compression circuit'19814,109,166'Clamping circuit'19784,059,785'CRT display with truncated Rho-Theta presentation'19774,041,357'High voltage protection circuit'19774,038,655'Radar contour edge restore circuit'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1983Patents assigned to RCA CORP (7)· patent assignee history
1977–1992Based in Chatsworth, CA, US· patent location history
1981–1983Patents assigned to SPERRY CORP (4)· patent assignee history
1982Patents assigned to CLARK CHARLES A (1)· patent assignee history
1982Based in Los Angeles, CA, US· patent location history
1988Patents assigned to CLARK CHARLES (1)· patent assignee history
1988Based in Longmont, CO, US· patent location history
1990–1992Patents assigned to SQUARE D CO (2)· patent assignee history
1992Based in Chalfont St. Giles, GB· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| RCA CORP | 7 | 1977–1983 |
| SPERRY CORP | 4 | 1981–1983 |
| SQUARE D CO | 2 | 1990–1992 |
| CLARK CHARLESself | 1 | 1988 |
| CLARK CHARLES Aself | 1 | 1982 |
Locations
| Location | Patents | Span |
|---|---|---|
| Chatsworth, California, US | 15 | 1977–1992 |
| Chalfont St. Giles, GB | 1 | 1992 |
| Longmont, CO, US | 1 | 1988 |
| Los Angeles, California, US | 1 | 1982 |