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| All Patents in class 427/292 | |||||
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| Number | Date | Patentee | Title | Type | |
| 108,940 | Nov. 01, 1870 | J. Rogers | Improvement in finishing the surfaces of plated goods | metal engraving machines | |
| 2,231,233 | Feb. 11, 1941 | H. Vienhaus | Process of finishing materials | metalworking machines | |