| Patents for Frederic Schoff |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 397,311 | Feb. 05, 1889 | F. Schoff | Drilling-machine | portable metal drilling machines |
| 420,284 | Jan. 28, 1890 | F. Schoff | Universal Joint Coupling | industrial machine universal joints |
| 428,023 | May 13, 1890 | F. Schoff | Casing for flexible shafts | flexible shafts |
| 437,459 | Sep. 30, 1890 | F. Schoff | Portable reaming and tapping tool | portable metal drilling machines |
| 439,567 | Oct. 28, 1890 | F. Schoff | Corner Drill Press | drill presses |
| 441,509 | Nov. 25, 1890 | F. Schoff | Drill-support | portable metal drilling machines |
