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| All Patents in class 164/109 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,360,484 | Nov. 30, 1920 | J.B. Wiard | Method of and apparatus for casting | |
 | 1,540,789 | Jun. 09, 1925 | C.M. McCord | Testing transformer | |
| 2,012,021 | Aug. 20, 1935 | E.W. Petersen | Method of Forming Rotors | ||
| 2,304,067 | Dec. 08, 1942 | G.R. Anderson | Production of Rotors for Electric Machines | ||