| Patents for Blackhawk Mfg. Co. |
Patents 1 -
15
of 80
      |
| Number | Date | Patentee | Title | Type |
| 1,443,413 | Jan. 30, 1923 | J. Johnson | Socket Wrench | ratchet wrenches |
| 1,574,136 | Feb. 23, 1926 | H.E. Tautz, F.E. Dion | Tool grip | wrench handle components |
| 1,685,503 | Sep. 25, 1928 | E.M. Pfauser | Socket Wrench | socket wrenches |
| 1,764,690 | Jun. 17, 1930 | E.M. Pfauser | Tool Handle | tool handles |
| 1,797,730 | Mar. 24, 1931 | E.M. Pfauser | Socket Attachment for Tools | socket wrenches |
| 1,807,134 | May 26, 1931 | E.M. Pfauser | Socket Wrench | ratchet wrenches |
| 1,873,472 | Aug. 23, 1932 | E.M. Pfauser | Socket Wrench | socket wrenches |
| 1,881,029 | Oct. 04, 1932 | E.M. Pfauser | Socket Wrench | socket wrenches |
| 1,896,645 | Feb. 07, 1933 | E.M. Pfauser | Coupling For Socket Wrenches | socket wrenches |
| 1,927,844 | Sep. 26, 1933 | E.M. Pfauser | Socket Wrench | wrench handle components |
| 1,936,640 | Nov. 28, 1933 | E.M. Pfauser | Reversible Friction Clutch | ratchet wrenches |
| 1,941,565 | Jan. 02, 1934 | S. Mandl | Socket Wrench | wrenches |
| RE19,093 | Feb. 27, 1934 | E.M. Pfauser | Coupling For Socket Wrenches | socket wrenches |
| RE19,287 | Aug. 21, 1934 | E.M. Pfauser | Coupling For Socket Wrenches | socket wrenches |
| 1,982,008 | Nov. 27, 1934 | E.M. Pfauser, S. Mandl | Coupling | socket wrenches |
