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| All Patents in class 192/104R | |||||
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| Picture | Number | Date | Patentee | Title | |
| 153,245 | Jul. 21, 1874 | G.W. Daimler | Gas Motor Engines | ||
| 345,670 | Jul. 20, 1886 | A. Campbell | Speed Regulator | ||
 | 390,216 | Oct. 02, 1888 | G.F. Evans | Speed Regulating Device | |
 | 453,033 | May 26, 1891 | J.G. Blount | Speed-controlling device | |
| 580,387 | Apr. 13, 1897 | J.F. Steward, G.H. Ellis | Explosive Engine | ||
 | 1,078,161 | Nov. 11, 1913 | F.E. Parker | Speed Governing Pulley | |
| 3,032,668 | May 01, 1962 | R.J. Howard, W.H. Woodward, K.A. Robinson | Control of Electric Machines | ||