| Patents for H. J. Bernhard |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 281,920 | Jul. 24, 1883 | W.L. Parmelee | Bit-stock |
 | 338,326 | Mar. 23, 1886 | H.M. Wilson | Pipe Wrench |
 | 340,516 | Apr. 20, 1886 | W. Moston | Improvement In Pipe-Tongs |
 | 341,503 | May 11, 1886 | A.P. Quigley | Improvements in Monkey-Wrenches |
 | 422,879 | Mar. 04, 1890 | W. Forgie | Improvements In Automatic Wrench for Coupling and Uncoupling the Tools or Drill-Rods of Well-Boring Apparatus |
 | 461,894 | Oct. 27, 1891 | E. Cook | Pipe Wrench |
 | 465,626 | Dec. 22, 1891 | J. Waterman | Convertible Drill and Wrench |
