| Patents for Blackhawk Mfg. Co. |
Patents 16 -
30
of 80
      |
| Number | Date | Patentee | Title | Type |
| 1,995,009 | Mar. 19, 1935 | S. Mandl, E.M. Pfauser | Ratchet Mechanism | ratchet wrenches |
| 2,003,155 | May 28, 1935 | E.M. Pfauser | Reversible Friction Clutch | ratchet wrenches |
| 2,018,148 | Oct. 22, 1935 | E.M. Pfauser | Safety Control for Mechanical Garage Jacks | |
| D97,562 | Nov. 19, 1935 | E.M. Pfauser | Hydraulic Jack | |
| D103,894 | Mar. 30, 1937 | S. Mandl | Wrench Stand or the Like | wrench set holders |
| D103,912 | Mar. 30, 1937 | S. Mandl | Wrench Case or the Like | wrench set holders |
| D103,913 | Mar. 30, 1937 | S. Mandl | Wrench Stand or the Like | workbenches |
| D103,914 | Mar. 30, 1937 | S. Mandl | Combined Wrench Stand and Case or the Like | workbenches |
| 2,093,284 | Sep. 14, 1937 | S. Mandl | Work Engagement Means for Jacks | |
| 2,100,564 | Nov. 30, 1937 | E.M. Pfauser, S. Mandl | Method of Producung a Pulling Strees and Hydraulic Pulling Mechanism | |
| D107,970 | Jan. 18, 1938 | E.M. Pfauser | Work Stand or the Like | workbenches |
| D108,143 | Jan. 25, 1938 | S. Mandl | Design for a Wrench Member | wrench sockets |
| D108,159 | Jan. 25, 1938 | S. Mandl | Wrench or the Like | wrench handle components |
| 2,108,866 | Feb. 22, 1938 | S. Mandl | Socket Wrench | socket wrenches |
| D109,498 | May 03, 1938 | E.M. Pfauser | Jack | |
