Richard G. Hall

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Warminster, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Remotely calibratable instrument system
- Patent number 4,849,754
- Issue date Jul 18, 1989
- Drexelbrook Controls
- Frederick L. Maltby
- G08 - SIGNALLING
Information Patent Grant
Remotely calibratable instrument system
- Patent number 4,723,122
- Issue date Feb 2, 1988
- Drexelbrook Controls, Inc.
- Frederick Maltby
- G08 - SIGNALLING