| Patents for Blackhawk Mfg. Co. |
Patents 61 -
75
of 80
      |
| Number | Date | Patentee | Title | Type |
| 2,459,080 | Jan. 11, 1949 | W. Killius | Mechanic's Work Holding Table Furnished with Adjustable Work-Supporting Arms | |
| 2,475,040 | Jul. 05, 1949 | S. Mandl | Ram | |
| 2,499,968 | Mar. 07, 1950 | E.M. Pfauser | Pneumatic-Hydraulic Pressure Converter | |
| 2,520,652 | Aug. 29, 1950 | S. Mandl, E.M. Pfauser | Adjustable Tool Handle | wrench handle components |
| 2,525,922 | Oct. 17, 1950 | S. Mandl | Rotary-Reciprocating Motion Converter | |
| 2,625,796 | Jan. 20, 1953 | W.A. Traut | Multispeed Hydraulic Power Device | |
| 2,687,056 | Aug. 24, 1954 | W.M. Foor | Open-End Wrench Having Wedgy Jaws and a Recessed Concave Bight Wall | nut wrenches |
| D181,071 | Sep. 24, 1957 | I.V. Stovern, W.L. Vallee | Vehicle Jack | |
| 2,814,540 | Nov. 26, 1957 | H.I. Southerwick | Piston Packing | |
| 2,824,381 | Feb. 25, 1958 | R.J. Traupmann | Pre-Indicator of Pipe Positions and Bends | pipe and tube benders |
| 2,867,087 | Jan. 06, 1959 | C.E. Holt | Hydraulic Valve for Pressure Applying Units | |
| 2,867,261 | Jan. 06, 1959 | R.J. Traupmann | Pipe Bender with Bend Indicator Means | pipe and tube benders |
| 2,867,409 | Jan. 06, 1959 | H.I. Southerwick | Service Jack | |
| 2,895,712 | Jul. 21, 1959 | W.L. Vallee, I.V. Stovern | Adjustable Load Support | |
| 2,909,358 | Oct. 20, 1959 | H.I. Southerwick | Portable Jack Assemblage | |
