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| All Patents in class 235/104 | |||||
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| Number | Date | Patentee | Title | Type | |
| 418,411 | Dec. 31, 1889 | L.B. Holmes | Speed Indicator | measurement gauges | |
| 502,649 | Aug. 01, 1893 | H.C. Andersen | Speed Indicator for Shafting | measurement gauges | |
| 749,743 | Jan. 19, 1904 | T.H. McQuown | Speed-indicator | ignition systems | |