| All Patents in class 91/304 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 54,090 | Apr. 24, 1866 | G.H. Babcock, S. Wilcox, Jr. | Improvement in cut-off valves |
| | 504,283 | Aug. 29, 1893 | S.D. Shepperd | Water Motor |
| | 1,102,367 | Jul. 07, 1914 | H. Tscherning | Jarring apparatus for packing granular materials |
| | 1,145,177 | Jul. 06, 1915 | A.D. Baker | Engine |
| | 1,912,413 | Jun. 06, 1933 | E.J. Svenson | Milling machine |
| | 2,164,875 | Jul. 04, 1939 | C. Herfurth | Grinding Machine |
| | 2,247,479 | Jul. 01, 1941 | H.J. Caldwell | Honing machine |
| | 2,811,141 | Oct. 29, 1957 | A.C. Nolte, R.T. Van Coney | Control Mechanism |
| | 3,949,644 | Apr. 13, 1976 | W.G. Suechting | Pneumatic-hydraulic pumping device |
