Ralph C. Padfield

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Lehigh County, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Pressurized tundish for controlling a continuous flow of molten metal
- Patent number 4,942,986
- Issue date Jul 24, 1990
- Thomas W. Lewis
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Low-head feeding system for thin section castings
- Patent number 4,915,270
- Issue date Apr 10, 1990
- USX Corporation
- Sabah S. Daniel
- B22 - CASTING POWDER METALLURGY