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| All Patents in class 74/473.26 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,515,710 | Jul. 18, 1950 | M.P. Holmes | Gear-shifting Mechanism | metalworking speed changing mechanisms | |
| 3,389,616 | Jun. 25, 1968 | S.E. Farekas | Lever Interlock | ||