| All Patents in class 73/524 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 111,677 | Feb. 07, 1871 | G.F. Pottle | Improvement in governors for steam-engines | steam engine governors |
| 139,184 | May 20, 1873 | J.W. Osborne | Speed Gage | rpm speed gauges and tachometers |
| 194,041 | Aug. 14, 1877 | R.K. Huntoon | Improvement in apparatus for regulating the supply of steam to gas-exhausters | |
| 627,589 | Jun. 27, 1899 | W. Moon | Speed Indicator | automotive tools |
| 816,089 | Mar. 27, 1906 | R.W. Hargrave | Speed Meter | wheel-based measurers |
| 1,209,359 | Dec. 19, 1916 | N. Tesla | Speed-indicator | |
| 1,274,816 | Aug. 06, 1918 | N. Tesla | Speed-Indicator | |
