| Patents for F. A. Otto |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 642,155 | Jan. 30, 1900 | E. Campbell, G. Redford | Wrench | quick adjust wrenches |
| 656,260 | Aug. 21, 1900 | T.A. Panyard | Caliper Attachment | calipers |
| 693,353 | Feb. 11, 1902 | J.B. Erwin | Can Holder | jar wrenches |
| 742,238 | Oct. 27, 1903 | A. Roesch | Jar Holder | jar wrenches |
| 760,532 | May 24, 1904 | A.J. Gerhardt | Wrench For Meat Choppers | auxiliary wrenches |
| 1,132,663 | Mar. 23, 1915 | C.J. Luther | Honing Implement for Chisels, &c. | tool grinders |
| 1,196,789 | Sep. 05, 1916 | W.F. Koelpin | Calipering Tool | measurement gauges |
| 1,450,598 | Apr. 03, 1923 | E.J. Kearney | Slide Actuating Mechanism | milling machine accessories |
