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| All Patents in class 403/326 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,719,072 | Jul. 02, 1929 | H.L. Myers | Brush-retaining device | ||
| 1,917,531 | Jul. 11, 1933 | J.F. Lincoln | Electric Arc Welding Apparatus | welding machines | |
| 1,958,024 | May 08, 1934 | A.L. Stowell | Friction Spring | rules | |
| 6,851,341 | Feb. 08, 2005 | D.J. Iwinski, M.H. Opgenorth, K. Converse, G.A. Putney, D.M. Eggert | Locking Drive Tool | socket wrenches | |