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| All Patents in class 74/351 | |||||
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| Number | Date | Patentee | Title | Type | |
| 483,281 | Sep. 27, 1892 | C.F. Christopher | Driving Mechanism for Road Engines | traction engine propulsion components | |
| 723,228 | Mar. 24, 1903 | J. Banwell | Reversible and Variable Speed Mechanism | metalworking speed changing mechanisms | |