Number | Name | Date | Kind |
---|---|---|---|
2267607 | Harvey | Dec 1941 | |
2727364 | Perez | Dec 1955 | |
2954877 | Sweynor | Oct 1960 | |
3205674 | Arnold et al. | Sep 1965 | |
3210957 | Rutishauser et al. | Oct 1965 | |
3242686 | Bowman et al. | Mar 1966 | |
3520146 | Arnold et al. | Jul 1970 | |
3590595 | Briggs | Jul 1971 | |
3653221 | Angus | Apr 1972 | |
3675441 | Perez | Jul 1972 | |
3763658 | Gaumer, Jr. et al. | Oct 1973 | |
3995443 | Iversen | Dec 1976 | |
4000626 | Webber | Jan 1977 | |
4170117 | Faxon | Oct 1979 | |
4266406 | Ellis | May 1981 | |
4280335 | Perez et al. | Jul 1981 | |
4384462 | Overman et al. | May 1983 | |
4454728 | Hanada et al. | Jun 1984 | |
4513574 | Humphreys et al. | Apr 1985 | |
4535602 | Alsenz et al. | Aug 1985 | |
4535603 | Willitts et al. | Aug 1985 | |
4628700 | Alsenz | Dec 1986 | |
4656836 | Gilbertson | Apr 1987 | |
4732007 | Dolan et al. | Mar 1988 | |
4751823 | Hans | Jun 1988 | |
4802338 | Oswalt et al. | Feb 1989 | |
4819444 | Meckler | Apr 1989 | |
4827735 | Foley | May 1989 | |
4850201 | Oswalt et al. | Jul 1989 | |
5038574 | Osborne | Aug 1991 | |
5042262 | Gyger et al. | Aug 1991 | |
5044172 | Inoue et al. | Sep 1991 | |
5065591 | Shaw | Nov 1991 | |
5072596 | Gilbertson et al. | Dec 1991 | |
5076067 | Prenger et al. | Dec 1991 | |
5211031 | Murayama et al. | May 1993 | |
5335508 | Tippmann | Aug 1994 |
Number | Date | Country |
---|---|---|
0217167 | Aug 1989 | JPX |
Entry |
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Gordon Duffy and Ed Bas; Article Entitled "Two-Stage System Uses R-22"; Air Conditioning, Heating & Refrigeration News; Aug. 17, 1994; pp. 30 and 31. |