Inventor

DOPSON DALE A

US2 patents

Patents

2 patents

US5301511AApr 12, 1994

Cryopump and cryopanel having frost concentrating device

HELIX TECH CORP19 citations73

US4949546AAug 21, 1990

Compact heat exchanger for a cryogenic refrigerator

HELIX TECH CORP17 citations70