James E. Stangroom — 15 Patents at Er Fluid Developments Limited

James E. Stangroom has been granted 15 US patents while listed as an inventor at Er Fluid Developments Limited. The first was granted in 1982 and the most recent in August 2001. James E. Stangroom ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list James E. Stangroom in Castleton, GB.

Patents per Year

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Showing 1–15 of 15 patents

Patent #	Title	Co-Inventors	Date
6272852	High speed actuators and vibrators based on electro-rheological fluids	—	2001-08-14
5826533	Twin-hulled boat	John George Clancy	1998-10-27
5626768	Sterilization of opaque liquids with ultraviolet radiation	Barry Ressler, Gary L. Morgan, Richard J. Herbermann, David Wright	1997-05-06
5516235	Method and apparatus of raising objects from the sea bed	—	1996-05-14
5409354	Variable displacement pump	—	1995-04-25
5356269	Variable displacement pump	—	1994-10-18
5106522	Fluid compositions	Ian Harness	1992-04-21
4812251	Electro-rheological fluids/electric field responsive fluids	—	1989-03-14
4664236	Electrically controlled, progressive, frictional, torque transmitting device	—	1987-05-12
4532853	Fluid-powered actuators	—	1985-08-06
4502973	Electroviscous fluids	—	1985-03-05
4493615	Electro-rheological transducer	—	1985-01-15
4483788	Electric field responsive fluids	Ian Harness	1984-11-20
4444298	Viscous shear clutch	—	1984-04-24
4342334	Hydraulic servo valve	—	1982-08-03

James E. Stangroom — 15 Patents

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