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| Patents for Rudolph Fricke | |||||
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| Number | Date | Patentee | Title | Type | |
| 447,185 | Feb. 24, 1891 | C. Hollweg | Corkscrew | pocket and protected cork extractors | |
| 580,195 | Apr. 06, 1897 | J.W. von Pittler | Milling-machine | milling machines | |
| 592,442 | Oct. 26, 1897 | J.W. von Pittler | Dynamometer | dynamometers | |
| 674,177 | May 14, 1901 | J.W. von Pittler | Lathe with rotary tool-head | turret lathes | |