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| All Patents in class 408/167 | |||||
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| Number | Date | Patentee | Title | Type | |
| 572,445 | Dec. 01, 1896 | B.W. Prentice | Sectional expansion-tap | taps and dies | |
| 2,432,855 | Dec. 16, 1947 | W.J. Blazek | Expansion-type reamers and hones | reamers | |
| 2,582,524 | Jan. 15, 1952 | J.Y. Blazek | Reamer and method of producing same | reamers | |