| Patents for Karl H. Butler |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 970,365 | Sep. 13, 1910 | B.F. Bain | Jar Holder | jar wrenches |
| 999,034 | Jul. 25, 1911 | D.P. Kahle | Wrench | quick adjust wrenches |
| 1,000,221 | Aug. 08, 1911 | H. Wilms | Drafting Instrument | squares |
| 1,006,185 | Oct. 17, 1911 | C. Dillhoff | Valve Releasing Tool | valve spring tools |
| 1,218,757 | Mar. 13, 1917 | O.C. Gessler | Compound Tool | combination cork extractors |
| 1,260,096 | Mar. 19, 1918 | S.J. Todd | Work Holder for Milling Machines | milling machine accessories |
| 1,262,830 | Apr. 16, 1918 | T. Nicolescu | Gage | special purpose gauges |
| 1,295,180 | Feb. 25, 1919 | L. Lowenstein | Depth Angle-Gage | depth gauges |
| 1,308,988 | Jul. 08, 1919 | L. Lowenstein | Ratchet Extension for Micrometers | measurement gauges |
| 1,410,110 | Mar. 21, 1922 | J.W. Moore | Wall Hanger for Radiators | radiators |
| 1,431,919 | Oct. 17, 1922 | H. Baerbalck | Crank-shaft lathe | metal lathes |
| 1,482,631 | Feb. 05, 1924 | L. de Linieres | Woodworking machine | tablesaws |
