| Patents for Frederick W. Hoefer |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 506,865 | Oct. 17, 1893 | D.C. Stover, F.W. Hoefer, E.A. Hoefer, A. Hoefer | Sensitive drill |
 | 542,694 | Jul. 16, 1895 | F.W. Hoefer, D.C. Stover | Sensitive drill press |
 | 542,695 | Jul. 16, 1895 | F.W. Hoefer, D.C. Stover | Variable-speed sensitive drill press |
| | 729,864 | Jun. 02, 1903 | E.A. Hoefer, A.G. Hoefer, F.W. Hoefer | Wire Gaging and Cutting Machine |
| | 766,883 | Aug. 09, 1904 | E.A. Hoefer, A.G. Hoefer, F.W. Hoefer | Drilling Machine |
| | 841,396 | Jan. 15, 1907 | F.W. Hoefer | Machine for Threading Pipes |
 | 1,164,813 | Dec. 21, 1915 | F.W. Hoefer, C.A. Hoefer | Multiple-spindle drill-head |
