Donald C. Simpson

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Norton, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electropneumatic positioner
- Patent number 5,257,639
- Issue date Nov 2, 1993
- Dresser Industries, Inc.
- Robert C. Prescott
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Electropneumatic positioner
- Patent number 5,159,949
- Issue date Nov 3, 1992
- Dresser Industries, Inc.
- Robert C. Prescott
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Electropneumatic transducer system
- Patent number 4,527,583
- Issue date Jul 9, 1985
- Dresser Industries, Inc.
- Donald C. Simpson
- G05 - CONTROLLING REGULATING