Charles W. Berk

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St. Joseph, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Isothermal calorimeter
- Patent number 5,322,360
- Issue date Jun 21, 1994
- Leco Corporation
- Peter M. Willis
- G01 - MEASURING TESTING
Information Patent Grant
Electrode system for resistance furnace
- Patent number 4,056,677
- Issue date Nov 1, 1977
- Leco Corporation
- Charles W. Berk
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Arc control circuit
- Patent number 4,019,017
- Issue date Apr 19, 1977
- Leco Corporation
- George J. Sitek
- G01 - MEASURING TESTING
Information Patent Grant
Electrode construction for resistance heating furnace
- Patent number 3,936,587
- Issue date Feb 3, 1976
- Leco Corporation
- George J. Sitek
- F27 - FURNACES KILNS OVENS RETORTS