| All Patents in class 91/279 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | 10,486 | Jan. 31, 1854 | P.L. Weimer | Steam Hammer |
| | 16,515 | Jan. 27, 1857 | S.P. Francisco, P.L. Weimer | Steam Hammer |
| | 168,439 | Oct. 05, 1875 | S.D. Wilson | Steam-Hammers |
 | 1,580,094 | Apr. 06, 1926 | A. White | Tool-operating machine |
| | 1,912,413 | Jun. 06, 1933 | E.J. Svenson | Milling machine |
| | 2,040,990 | May 19, 1936 | F.S. Haas, R.L. Goetzel | Hydraulic Control Mechanism |
| | 2,163,246 | Jun. 20, 1939 | G.F. Maglott | Grinding Machine |
 | 2,442,635 | Jun. 01, 1948 | R.D. Bennett | Spline or gear grinder |
 | 2,537,391 | Jan. 09, 1951 | H.F. Bakewell | Hydraulic ram device with intermittent high-pressure fluid supply |
 | 2,604,071 | Jul. 22, 1952 | P.A. Rickrode | Drop hammer of the gravity type |
