| All Patents in class 73 |
Patents 16 -
30
of 661
      |
| Number | Date | Patentee | Title | Type |
| 14,967 | May 27, 1856 | W.W. Mead | Governor | steam engine governors |
| 18,526 | Oct. 27, 1857 | E.G. Allen | Steam-pressure gage | steam pressure gauges |
| 18,560 | Nov. 03, 1857 | T.R. Timby | Barometer | |
| 20,851 | Jul. 06, 1858 | J. Lowe | Steam Pressure Gage | steam pressure gauges |
| 23,032 | Feb. 22, 1859 | T.W. Lane | Steam-pressure gage | steam pressure gauges |
| 25,615 | Oct. 04, 1859 | A.J. Allen | Steam Gage | steam pressure gauges |
| 26,152 | Nov. 22, 1859 | E.G. Allen | Combination steam-gage | steam pressure gauges |
| 26,654 | Jan. 03, 1860 | M. Cridge | Govenor | steam engine governors |
| 26,871 | Jan. 17, 1860 | E.G. Allen | Steam-gage | steam pressure gauges |
| 26,900 | Jan. 24, 1860 | H.W. Farley | Pressure-gage | steam pressure gauges |
| 29,646 | Aug. 14, 1860 | A.J. Allen | Steam Pressure Gage | steam pressure gauges |
| 30,803 | Dec. 04, 1860 | C.M. Daboll | Pressure-gage | steam pressure gauges |
| 33,126 | Aug. 20, 1861 | M. Stannard | Improvement in rotary pumps | |
| 36,621 | Oct. 07, 1862 | T.R. Pickering | Improved centrifugal governor | steam engine governors |
| 37,064 | Dec. 02, 1862 | J. Tremper | Improvement in centrifugal governors | steam engine governors |
