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| Patents for Alexander Oberhoffken | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,461,097 | Jul. 10, 1923 | H.C. Rose, A. Oberhoffken | Circular Milling Machine | ||
 | 1,461,098 | Jul. 10, 1923 | H.C. Rose, A. Oberhoffken | Milling Machine | |
| D83,743 | Mar. 24, 1931 | E.M. Bowen, A. Oberhoffken | Machine Tool | ||
| 2,096,754 | Oct. 26, 1937 | A. Oberhoffken | Machine Tool | ||