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| All Patents in class 451/505 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,045,201 | Nov. 26, 1912 | C.G. Shoop | Pneumatic roll | sanding machines | |
| 1,487,256 | Mar. 18, 1924 | A.W. Mall | Pneumatic abrading cushion | handheld power sanders | |
| 1,493,779 | May 13, 1924 | H. Humphreys | Pneumatic sanding pad | sanding machines | |
| 2,116,272 | May 03, 1938 | A.W. Mall | Abrasive wheel | ||
| 2,505,680 | Apr. 25, 1950 | A.W. Mall | Pneumatic sanding wheel | ||