Inventor

Charles R. Stein

Inventor

Schenectady, NY, US

Overview

12→

Patents

1977–1996

Patent span

Physics

Primary field (CPC G)

Patents· 12 as inventor

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

H04Lprimary

H04LTransmission of digital information, e.g. telegraphic communication24%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein12%

G09GArrangements or circuits for control of indicating devices using static means to present variable information12%

C09KMaterials for miscellaneous applications, not provided for elsewhere6%

F25BRefrigeration machines, plants or systems6%

G01RMeasuring electric variables6%

G06FElectric digital data processing6%

H01JElectric discharge tubes or discharge lamps6%

Y02ATechnologies for adaptation to climate change6%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications6%

PatentTitleYear

5,497,630'Method and apparatus for hydride heat pumps'1996 5,106,570'Intense negative ion source'1992 D0305968'Food scoop'1990 4,737,953'Local area network bridge'1988 4,730,307'Method and apparatus for local area networks'1988 4,715,030'Local area network bridge'1987 4,714,802'Apparatus and method for determining the source direction of local area network transmissions'1987 4,571,585'Matrix addressing of cholesteric liquid crystal display'1986 4,224,617'Liquid crystal display'1980 4,128,313'Liquid crystal display with dark characters on light background'1978 4,116,543'Control electro-optical device utilizing liquid crystal'1978 4,060,801'Method and apparatus for non-scan matrix addressing of bar displays'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1988Patents assigned to GEN ELECTRIC (9)· patent assignee history

1977–1988Based in Schenectady, NY, US· patent location history

1990Patents assigned to STEIN CHARLES (1)· patent assignee history

1990Based in Philadelphia, PA, US· patent location history

1992Patents assigned to US AIR FORCE (1)· patent assignee history

1992–1996Based in Albuquerque, NM, US· patent location history

1996Patents assigned to THERMAL ELECTRIC DEVICES INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GEN ELECTRIC	9	1977–1988
STEIN CHARLESself	1	1990
THERMAL ELECTRIC DEVICES INC	1	1996
US AIR FORCE	1	1992

Locations

Location	Patents	Span
Schenectady, New York, US	9	1977–1988
Albuquerque, NM, US	2	1992–1996
Philadelphia, Pennsylvania, US	1	1990