James C. Calderwood

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Tulsa, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Automated fin tube process
- Patent number 5,423,121
- Issue date Jun 13, 1995
- McElroy Manufacturing, Inc.
- Arthur H. McElroy
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Pneumatic mandrel for machining and fusion of plastic pipe
- Patent number 5,078,827
- Issue date Jan 7, 1992
- McElroy Manufacturing, Inc.
- James C. Calderwood
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL