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| All Patents in class 74/167 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,033,686 | Mar. 10, 1936 | F.M. Davis | Multiple operation machine | |
| 2,902,889 | Sep. 08, 1959 | H.W. Trechsel | Hydraulic Turret Index | ||
| 2,924,127 | Feb. 09, 1960 | C.H. Johnson | Indexing Apparatus | ||