Dick J. Kolkman

Follow

Person

Gibsonia, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Vital inverter driver
- Patent number 4,652,986
- Issue date Mar 24, 1987
- American Standard Inc.
- Dick J. Kolkman
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Fail-safe voltage-limiting circuit for an audio frequency overlay t...
- Patent number 4,645,148
- Issue date Feb 24, 1987
- American Standard Inc.
- Dick J. Kolkman
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Transfer apparatus for energy sources
- Patent number 4,099,692
- Issue date Jul 11, 1978
- Westinghouse Air Brake Company
- Dick J. Kolkman
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Fail-safe time delay circuit
- Patent number 4,059,845
- Issue date Nov 22, 1977
- Westinghouse Air Brake Company
- Dick J. Kolkman
- H01 - BASIC ELECTRIC ELEMENTS