| Patents for Blackhawk Mfg. Co. |
Patents 46 -
60
of 80
      |
| Number | Date | Patentee | Title | Type |
| 2,238,968 | Apr. 22, 1941 | H.P. Brumder | Hydraulic Jack | |
| 2,242,613 | May 20, 1941 | S. Mandl | Torque Wrench | torque wrenches |
| 2,255,984 | Sep. 16, 1941 | E.M. Pfauser | Hydraulic Pump System | hydraulic pumps |
| 2,259,533 | Oct. 21, 1941 | E.M. Pfauser | Spring Spreader | spreaders |
| 2,262,969 | Nov. 18, 1941 | E.H. Schultz | Wheel Puller | |
| 2,277,256 | Mar. 24, 1942 | E. Pfauser | Hydraulic Apparatus | |
| 2,282,148 | May 05, 1942 | S. Mandl | Tool Handle | wrench handle components |
| 2,283,382 | May 19, 1942 | S. Mandl | Ratchet Mechanism | ratchet wrenches |
| 2,286,880 | Jun. 16, 1942 | W.A. Traut | Hydraulic Control System | |
| 2,286,917 | Jun. 16, 1942 | S. Mandl | Ratchet Socket | ratchet wrenches |
| 2,296,173 | Sep. 15, 1942 | S. Mandl | Spreading Tool | |
| 2,299,492 | Oct. 20, 1942 | E.M. Pfauser | Pump Assembly | hydraulic pumps |
| 2,314,589 | Mar. 23, 1943 | S. Mandl | Jack Assemblage | |
| 2,348,412 | May 09, 1944 | E.M. Pfauser | Pump Assemblage | hand pumps |
| 2,360,385 | Oct. 17, 1944 | C.A. Anderson | Drill | drill bits |
