Number | Name | Date | Kind |
---|---|---|---|
3564171 | Hammond | Feb 1971 | |
4071725 | Smith | Jan 1978 | |
4377090 | Seulen | Mar 1983 | |
4443671 | Hinds | Apr 1984 | |
4827092 | Kobold | May 1989 |
Entry |
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Fluid Flow Switch, Mod. Q-9, Harwil Corporation, Apr. 1986. |
Water Flow Switch, Mod. Q-10, Harwil Corporation, Nov. 1989. |