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Patents for Mary Birdsall | |||||
Number | Date | Patentee | Title | Type | |
403,321 | May 14, 1889 | E.M. Birdsall | Traction Wheel | steam traction engines | |
403,455 | May 14, 1889 | E.M. Birdsall | Valve Gear | traction engine valve gear | |
404,157 | May 28, 1889 | E.M. Birdsall | Traction Engine | steam traction engines | |
415,438 | Nov. 19, 1889 | E.M. Birdsall | Steam-engine | steam engines | |
415,439 | Nov. 19, 1889 | E.M. Birdsall | Traction Engine | steam traction engines |