| All Patents in class 91/391R |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 313,396 | Mar. 03, 1885 | T.S. Wilkin | Saw-mill set-works | sawmill set works |
| 1,234,882 | Jul. 31, 1917 | W.A. Doble | Speed Governor | water wheel governors |
| 1,938,762 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | cylindrical grinders |
| 1,976,122 | Oct. 09, 1934 | F.S. Haas | Hydraulic Drive for Grinding Machines | grinding machines |
| 2,164,875 | Jul. 04, 1939 | C. Herfurth | Grinding Machine | grinding machines |
| 2,170,503 | Aug. 22, 1939 | H. Ernst, M.E. Martellotti | Milling Machine | milling machines |
| 2,216,800 | Oct. 08, 1940 | W.G. Baldenhofer | Hydraulic Control Device | hydraulic apparatus |
| 2,235,085 | Mar. 18, 1941 | E.G. Roehm, H. Fritschi | Milling Machine Transmission and Control Mechanism | milling machines |
