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| All Patents in class 83/174.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,977,067 | Oct. 16, 1934 | H.L. Johnston | Slicing machine | ||
| 2,079,891 | May 11, 1937 | G.R. Wood | Knife sharpener | ||
| 3,040,602 | Jun. 26, 1962 | R.R. Carlton | Saw Chain Sharpener and Method | chainsaw sharpeners | |