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| Patents for Franz Rossberger | |||||
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| Picture | Number | Date | Patentee | Title | |
| CH-522,473 | Jun. 30, 1972 | F. Rossberger | Device for Adjusting the Transmission Ratio of the Vertical Movement Between the Model Stylus and the Tool on a Copying Machine, in Particular a Post-Forming Milling Machine | ||