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| All Patents in class 15/230.12 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE399 | Oct. 07, 1856 | L. Boardman | Polishing Spoons | polishing machines | |
| 343,621 | Jun. 15, 1886 | W. Baker | Polishing Wheel | polishing and deburring wheels | |