| All Patents in class 72/441 |
Patents 46 -
56
of 56
      |
| Number | Date | Patentee | Title | Type |
| 1,486,976 | Mar. 18, 1924 | B.J. Lindgren | Machine for compressing corrugated pipes | |
| 2,014,162 | Sep. 10, 1935 | H.F. MacMillin, E. Benedek | Hydraulic Press | hydraulic presses |
| 2,220,037 | Oct. 29, 1940 | R.P. Fitzgerald | Double-acting drop hammer | drop hammers |
| 2,394,636 | Feb. 12, 1946 | F.J. Rode | Progressive drawing press | stamping presses |
| 2,619,072 | Nov. 25, 1952 | E.C. Clarke, Jr., P.A. Rickrode | Drop hammer control | drop hammers |
| 2,942,503 | Jun. 28, 1960 | R.P. Fitzgerald | Power operated hammers | drop hammers |
| 3,116,780 | Jan. 07, 1964 | C.J. Bath | Prestretch Fixture and Combination Thereof With Drawing Die Press | metal stretch forming machines |
| 3,162,232 | Dec. 22, 1964 | F.E. Munschauer, Jr., G.H. Trautman, Jr. | Multiple depth control for power press brakes | stamping presses |
| 3,457,833 | Jul. 29, 1969 | R.K. Sedgwick | Quill Adjusting and Locking Means | milling machines |
| 3,841,140 | Oct. 15, 1974 | J.F. Hryc | Control system for press brakes and the like | sheet metal brakes |
| 4,170,124 | Oct. 09, 1979 | R. MacGregor | Hydraulic control system for press brakes and the like | sheet metal brakes |
