David G. Kumbera

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Greendale, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Protective switch device and operating mechanism therefor
- Patent number 4,168,414
- Issue date Sep 18, 1979
- McGraw-Edison Company
- David G. Kumbera
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Cable connected drawout switchgear
- Patent number 4,154,993
- Issue date May 15, 1979
- McGraw-Edison Company
- David G. Kumbera
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Protective switch device and operating mechanism therefor
- Patent number 4,124,790
- Issue date Nov 7, 1978
- McGraw-Edison Company
- David G. Kumbera
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Encapsulated vacuum fuse assembly
- Patent number 3,955,167
- Issue date May 4, 1976
- McGraw-Edison Company
- David G. Kumbera
- H01 - BASIC ELECTRIC ELEMENTS