John E. Kercheval

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Wyland/Natick, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Split ring seal for cryogenic refrigerator
- Patent number 4,355,519
- Issue date Oct 26, 1982
- Helix Technology Corporation
- John E. Kercheval
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...