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| Patents for Rudolph Fricke | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 447,185 | Feb. 24, 1891 | C. Hollweg | Corkscrew | |
![]() | 580,195 | Apr. 06, 1897 | J.W. von Pittler | Milling-machine | |
![]() | 592,442 | Oct. 26, 1897 | J.W. von Pittler | Dynamometer | |
![]() | 674,177 | May 14, 1901 | J.W. von Pittler | Lathe with rotary tool-head | |