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| All Patents in class 417/423.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,423,190 | Jul. 18, 1922 | G. Clements | Blower | |
 | 1,911,471 | May 30, 1933 | E.P. Sacrey | Cooling fan for electric motor operated tools | |
 | 2,321,126 | Jun. 08, 1943 | G.W. Breuer | Dust-tight blower | |
| 2,351,878 | Jun. 20, 1944 | P.S. Russel | Controlling Means | ||