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Richard A. Ferren
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Ambler, PA, US
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last 30 patents
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Patent Grant
Die drawing process and apparatus for piezoelectric polymer films a...
Patent number
4,800,048
Issue date
Jan 24, 1989
Pennwalt Corporation
Philip E. Bloomfield
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
Power steering direction sensor
Patent number
4,366,768
Issue date
Jan 4, 1983
Pennwalt Corporation
Walter Kulischenko
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Patent Grant
Single electrode poling of dielectric films
Patent number
4,127,681
Issue date
Nov 28, 1978
Pennwalt Corporation
Richard A. Ferren
H01 - BASIC ELECTRIC ELEMENTS