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| Patents for Rudolph P. Gerlach | |||||
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| Number | Date | Patentee | Title | Type | |
| 303,997 | Aug. 26, 1884 | R.P. Gerlach, F. Stahl | Saw-tooth | insertable saw teeth | |
| 664,399 | Dec. 25, 1900 | F. Stahl, R.P. Gerlach | Stave-sawing machine | cooper | |
| 678,729 | Jul. 16, 1901 | R.P. Gerlach | Sawing or cutting machine | cooper | |