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| All Patents in class 451/58 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 819,369 | May 01, 1906 | J. Nelson | Method in Polishing Sheet Metal | ||
| 1,993,823 | Mar. 12, 1935 | G.W. Binns | Art of Grinding | ||
| 2,750,718 | Jun. 19, 1956 | S.G. Brady | Method and Apparatus for Grinding Inner Side Faces of Channel Members | ||
 | 2,932,205 | Apr. 12, 1960 | T.B. Keesling | Power operated tool attachment for electric drills and the like | |
| 2,938,312 | May 31, 1960 | A.W. Mall | Method of fabricating chain saw guide bars | ||