Mark C. Matzka

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Rochester Hills, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Switch apparatus requiring the hand of the operator to activate the...
- Patent number RE37777
- Issue date Jul 2, 2002
- Jeffrey G. Herman
- 250 - Radiant energy
Information Patent Grant
Photoelectric switch for use with a machine control circuit
- Patent number 5,665,961
- Issue date Sep 9, 1997
- Break-A-Beam, Inc.
- Mark C. Matzka
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Photoelectric switch for use with a machine control circuit
- Patent number 5,367,158
- Issue date Nov 22, 1994
- Break-A-Beam, Inc.
- Jeffrey G. Herman
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Contoured transparent cover for a photoelectric switch
- Patent number D346587
- Issue date May 3, 1994
- Break-A-Beam, Inc.
- Jeffrey G. Herman
- D13 - Equipment for production, distribution, or transformation of energy
Information Patent Grant
Switch apparatus including a pair of beam-type switches
- Patent number 4,939,358
- Issue date Jul 3, 1990
- Jeffries, Inc.
- Jeffrey G. Herman
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...