| All Patents in class 74/609 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 97,098 | Nov. 23, 1869 | T. Loring | Improvement in grindstones | sharpening apparatus |
| 801,542 | Oct. 10, 1905 | T.A. Panyard | Grinding and polishing machine | sharpening machines |
| 897,610 | Sep. 01, 1908 | R.I. Fancher | Flexible Power Transmitting Mechanism | metalworking machine mechanisms |
| 987,589 | Mar. 21, 1911 | E.S. Mummert | Grinding Machine for Sharpening Edged Tools | sharpening machines |
| 995,082 | Jun. 13, 1911 | J.W. Oliver | Attachment for circular-saw machines | woodworking machine safety guards |
| 1,091,156 | Mar. 24, 1914 | L.N. Nelson | Saw-guard | woodworking machine safety guards |
| 1,135,087 | Apr. 13, 1915 | J.E. Webster | Oil-guard for dynamo-electric machines | electric motors |
| 1,256,179 | Feb. 12, 1918 | O. Smith | Guard or safety device for machinery | |
| 1,333,135 | Mar. 09, 1920 | J.A. Secor | Foot Guard for Flywheels | safety guards and apparatus |
| 1,406,914 | Feb. 14, 1922 | V.A. Virgilio | Adjustable safety guard for emery wheels | grinders |
| 2,227,404 | Dec. 31, 1940 | W.F. Zimmermann | Guard for Horizontal Shafts | gear hobbing machines |
