Number | Name | Date | Kind |
---|---|---|---|
3122896 | Hickey | Mar 1964 | |
3769806 | Boissin et al. | Nov 1973 | |
4446702 | Peterson et al. | May 1984 | |
4485631 | Winkler | Dec 1984 | |
4555907 | Bartlett | Dec 1985 | |
4724677 | Foster | Feb 1988 | |
4838035 | Carlson et al. | Jun 1989 |
Number | Date | Country |
---|---|---|
2161483 | Jul 1973 | FRX |
Entry |
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Haefer, "Cryogenic Vacuum Techniques," Journal of Physics E-Scientific Instruments, vol. 14, No. 3 Mar. 1981, pp. 273-288, Dorking (GB). |
Longsworth et al., "A cryopumped leak detector," Journal of Vacuum Science & Technology/Section A, vol. 5, No. 4, Jul./Aug., No. 4, Part IV, pp. 2646-2649. |