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