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| All Patents in class 451/380 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,151,420 | Oct. 06, 1964 | G.J. Machacek, Jr. | Machine for grinding knives | sharpening machines | |
| 3,861,088 | Jan. 21, 1975 | R.F. Brieco | Fixture for Supporting a Tool Subject to Grinding Including Accurately Positionable Tilting Angle Plate | grinding fixtures | |
| 4,733,501 | Mar. 29, 1988 | F.A. McLean | Honing guide | ||
| 6,926,596 | Aug. 09, 2005 | W.A. Tarris | Tool Sharpening Apparatus | tool grinders | |