Philip E. Johnson

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Worcester County, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Heartbeat communications
- Patent number 5,631,629
- Issue date May 20, 1997
- Allen-Bradley Company, Inc.
- Elik I. Fooks
- G08 - SIGNALLING
Information Patent Grant
Operator interface for a photoelectric control unit
- Patent number 5,347,117
- Issue date Sep 13, 1994
- Allen-Bradley Company, Inc.
- Elik I. Fooks
- G01 - MEASURING TESTING
Information Patent Grant
System for determining operational stability of a photoelectric con...
- Patent number 5,336,882
- Issue date Aug 9, 1994
- Allen-Bradley Company, Inc.
- Elik I. Fooks
- G01 - MEASURING TESTING
Information Patent Grant
Process for reliably detecting the passage of a target object using...
- Patent number 5,324,931
- Issue date Jun 28, 1994
- Allen-Bradley Company, Inc.
- Elik I. Fooks
- G01 - MEASURING TESTING
Information Patent Grant
Photoelectric control unit adapted for determining its own operatin...
- Patent number 5,281,810
- Issue date Jan 25, 1994
- Allen-Bradley Company, Inc.
- Elik I. Fooks
- G01 - MEASURING TESTING