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| All Patents in class 451/406 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,127,716 | Apr. 07, 1964 | J.F. Uckotter, R.D. Peters | Machine Tool Loader | workpiece changers and storage mechanisms | |
| 4,607,459 | Aug. 26, 1986 | S.C. Rees | Combined hollow grinder, sharpener and honer | ||
| 6,213,851 | Apr. 10, 2001 | R.W. Barta, J.E. Garcia | Abrading apparatus | ||