William G. Birchard

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Tucson, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Digitally controlled air-over-hydraulic actuator and method
- Patent number 4,765,225
- Issue date Aug 23, 1988
- William G. Birchard
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Digital linear actuator
- Patent number 4,751,821
- Issue date Jun 21, 1988
- William G. Birchard
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE