Marshall J. Smith

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Danvers, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
High pressure stepped clearance seal valve in a cryogenic refrigera...
- Patent number 4,708,165
- Issue date Nov 24, 1987
- Helix Technology Corporation
- Philip A. Lessard
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...