Otto E. Prenn

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Sherwood Park, CA

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Patents Grantslast 30 patents

Information Patent Grant
Composite electrode with non-consumable upper section
- Patent number 4,168,392
- Issue date Sep 18, 1979
- The Steel Company of Canada, Limited
- Otto E. Prenn
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Composite electrode with non-consumable upper section
- Patent number 4,121,042
- Issue date Oct 17, 1978
- The Steel Company of Canada Limited
- Otto E. Prenn
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR