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| Patents for Gerbing Mfg. Corp. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,475,954 | Jul. 12, 1949 | W.E. Gerbing | Variable speed pulley | ||
| 2,475,955 | Jul. 12, 1949 | W.E. Gerbing | Variable pitch pulley | ||
| 2,714,313 | Aug. 02, 1955 | W.E. Gerbing | Variable pitch pulley | ||
| 3,150,527 | Sep. 29, 1964 | G.L. Trandel | Variable speed device and adjusting means therefor | ||