John J. Kuhn

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Bushing balance controller for multiple segment bushings
- Patent number 5,071,459
- Issue date Dec 10, 1991
- PPG Industries, Inc.
- John J. Kuhn
- G05 - CONTROLLING REGULATING
Information Patent Grant
Ramp circuit for control loop
- Patent number 4,978,866
- Issue date Dec 18, 1990
- PPG Industries, Inc.
- John J. Kuhn
- G05 - CONTROLLING REGULATING
Information Patent Grant
High current multiterminal bushing controller
- Patent number 4,931,075
- Issue date Jun 5, 1990
- PPG Industries, Inc.
- John J. Kuhn
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Method of controlling glass fiber formation and control system
- Patent number 4,775,400
- Issue date Oct 4, 1988
- PPG Industries, Inc.
- Larry G. Wright
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Fiber forming bushing and method for providing
- Patent number 4,746,344
- Issue date May 24, 1988
- PPG Industries, Inc.
- John J. Kuhn
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Three-terminal controller for fiber glass bushing
- Patent number 4,594,087
- Issue date Jun 10, 1986
- PPG Industries, Inc.
- John J. Kuhn
- G05 - CONTROLLING REGULATING