Inventor

Charles E. Barker

Inventor

Holland, MI, US

Overview

8→

Patents

1980–1993

Patent span

Physics

Primary field (CPC G)

Patents· 8 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G05Dprimary

G05DSystems for controlling or regulating non-electric variables27%

F23NRegulating or controlling combustion20%

G05BControl or regulating systems in general20%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein7%

G04GElectronic time-pieces7%

G06FElectric digital data processing7%

H03KPulse technique7%

H05BElectric heating7%

PatentTitleYear

5,264,959'Temperature-insensitive phase-matched optical harmonic conversion crystal'1993 4,563,751'Carry propagate adder circuit which differentially senses a carry input'1986 4,460,125'Wall thermostat and the like'1984 4,410,813'High speed CMOS comparator circuit'1983 4,373,664'Wall thermostat and the like'1983 4,319,711'Wall thermostat and the like'1982 4,228,346'Self-calibrating electric clock circuit'1980 4,220,840'Pulsing probe for microwave oven'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1984Patents assigned to ROBERTSHAW CONTROLS CO (5)· patent assignee history

1980–1984Based in Holland, MI, US· patent location history

1983–1986Patents assigned to MOTOROLA INC (2)· patent assignee history

1983–1986Based in Round Rock, TX, US· patent location history

1993Patents assigned to US ARMY (1)· patent assignee history

1993Based in Sunnyvale, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
ROBERTSHAW CONTROLS CO	5	1980–1984
MOTOROLA INC	2	1983–1986
US ARMY	1	1993

Locations

Location	Patents	Span
Holland, MI, US	5	1980–1984
Round Rock, Texas, US	2	1983–1986
Sunnyvale, California, US	1	1993