Ralph Campbell

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of creating a registered pattern on a metal coil and associa...
- Patent number 5,081,923
- Issue date Jan 21, 1992
- Enamel Products & Plating Company
- Philip J. LaMantia
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method of creating a registered pattern on a metal coil and associa...
- Patent number 5,037,665
- Issue date Aug 6, 1991
- Enamel Products & Plating Company
- Philip J. LaMantia
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...