James H. Lewis

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London, CA

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Patents Grantslast 30 patents

Information Patent Grant
Machine and method for the manufacture of an air-to-air heat exchanger
- Patent number 4,554,719
- Issue date Nov 26, 1985
- Nutech Energy Systems, Inc.
- James H. Lewis
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...