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| Patents for Carl J. Schonhoft | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,795,088 | Jun. 11, 1957 | R. Bernhard, C.J. Schonhoft | Microcentric Grinder | ||
| 3,141,268 | Jul. 21, 1964 | C.J. Schonhoft, W.B. Seidel | Grinding Machine Spindle | ||