| All Patents in class 451/224 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 285,492 | Sep. 25, 1883 | G.W. King | Harvester Knife Grinder | sharpening machines |
| 417,001 | Dec. 10, 1889 | A.E. Creigh | Automatic knife-grinder | sharpening machines |
| 553,828 | Feb. 04, 1896 | C.W. Blood | Grinding-machine | |
| 1,016,585 | Feb. 06, 1912 | P.A. Solem | Grinding-machines | sharpening machines |
| 2,154,999 | Apr. 18, 1939 | F.W. Seybold | Composing room saw | printer |
| 2,754,631 | Jul. 17, 1956 | B.B. Stockard, Jr. | Knife grinder | cutter grinding |
| 5,048,236 | Sep. 17, 1991 | C.C. Williams | Saw Blade Tooth Grinder for Saws | saw sharpening machines |
