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Francis T. Lotz
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Whitehall, PA, US
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Patent Grant
Throttle cycle cryopumping system for Group I gases
Patent number
5,687,574
Issue date
Nov 18, 1997
APD Cryogenics, Inc.
Ralph C. Longsworth
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...