Number | Name | Date | Kind |
---|---|---|---|
2947452 | Frohmader et al. | Aug 1960 | |
3975470 | Engel | Aug 1976 | |
4125576 | Kozinski | Nov 1978 | |
4158679 | Yeagle | Jun 1979 | |
4562016 | Colliver | Dec 1985 | |
5851444 | Hansell, Jr. et al. | Dec 1998 |
Entry |
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Aprilaire Residential Humidifiers, Apr. 1, 1996. |