| All Patents in class 81/176.1 |
Patents 31 -
37
of 37
      |
| Number | Date | Patentee | Title | Type |
| 1,752,074 | Mar. 25, 1930 | G.R. Gagne | Spanner Wrench For Toothed Nuts | wrenches |
| 1,763,353 | Jun. 10, 1930 | W.M. Heller | Wrench | firehose and hydrant wrenches |
| 2,293,866 | Aug. 25, 1942 | A. Talch | Method of Making Tap Wrenches | tap wrenches and die stocks |
| D138,515 | Aug. 15, 1944 | O. Hardy | Combined Wrench and Spanner | firehose and hydrant wrenches |
| D138,790 | Sep. 12, 1944 | B. Czekalski | Master Coupling Spanner, Barrel Tap, and Rod Wrench Combination | wrench combination tools |
| 2,744,311 | May 08, 1956 | E. Nipken, W. Nipken | Drill extractor | drilling and boring |
| 4,095,492 | Jun. 20, 1978 | M.A. Makela | Radiator Cap Turning Tool | automotive tools |
