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All Patents of Type: pressure controlled switches | |||||
Number | Date | Patentee | Title | Type | |
1,904,311 | Apr. 18, 1933 | F.G. Hobart | Fluid Pressure Switch | pressure controlled switches | |
2,422,342 | Jun. 17, 1947 | E.J. Dillman | Pressure Regulated Electrical Control | pressure controlled switches | |
2,548,877 | Apr. 17, 1951 | E.J. Dillman | Automatically Operable Snap Acting Switch | pressure controlled switches |