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| All Patents in class 235/61C | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,896,527 | Feb. 07, 1933 | C.R. Houghton | Tandem meter | gas meters | |
| 2,228,068 | Jan. 07, 1941 | E.J. White | Integrating Apparatus | conveyors and hoppers | |
| 2,860,430 | Nov. 18, 1958 | J.H. McKewen | Prescheduling Means for Machine Tool | machine tool controls | |