| All Patents in class 81/446 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 138,568 | May 06, 1873 | L. Littlejohn | Bung-Bush Inserters | self-adjust wrenches |
| 145,807 | Dec. 23, 1873 | L. Littlejohn | Bung-Bush Inserters | wrenches |
| 147,241 | Feb. 10, 1874 | G.B. Cornell | Wrenches for Inserting Bung-Bushes | wrenches |
| 249,143 | Nov. 01, 1881 | H. Cottrell | Expanding Mandrel | mandrels and arbors |
| 251,333 | Dec. 20, 1881 | A. Zoller | Wrench For Bung Bushes | wrenches |
| 349,556 | Sep. 21, 1886 | A.G. Anderson | Bung Bush Wrench | wrenches |
| 514,477 | Feb. 13, 1894 | J.U. Kraft | Wrench | wrenches |
| 2,528,873 | Nov. 07, 1950 | J.A. Dorman | Pipe Chuck | pipe and chain vises |
| 2,920,894 | Jan. 12, 1960 | H.C. Kreinick | Quick Acting Tool Holder | metalworking machine tool holders |
