|
| US3946286 | 30 Oct 1974 | 23 Mar 1976 | UPO Oskeyhtio | Device for controlling the formation of frost on cooling radiators and the defrosting of the same |
| US3961495 | 26 Mar 1975 | 8 Jun 1976 | Centre de Recherche Industrielle du Quebec | Frost detecting device for a refrigeration apparatus |
| US4045971 | 1 Mar 1976 | 6 Sep 1977 | Emerson Electric Co. | Frost detector |
| US4205533 | 28 Jul 1978 | 3 Jun 1980 | General Electric Company | Refrigerator having a control indicator optic arrangement and indicating method |
| US4370816 | 27 Oct 1980 | 1 Feb 1983 | VE.DA. S.r.l | Closed-circuit condensation purifier for gaseous flows containing solvents and moisture |
| US4409795 | 8 Jun 1981 | 18 Oct 1983 | Russell Coil Company | Demand defrost system |
| US4531376 | 27 Ago 1982 | 30 Jul 1985 | | Refrigerator defrost control |
| US4838279 | 12 May 1987 | 13 Jun 1989 | | Respiration monitor |
| US5862669 | 15 Feb 1996 | 26 Ene 1999 | Springwell Dispensers, Inc. | Thermoelectric water chiller |
| US5884487 | 24 Feb 1998 | 23 Mar 1999 | Springwell Dispensers, Inc. | Thermoelectric water chiller with ice block |