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| All Patents in class 29/DIG.81 | |||||
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| Number | Date | Patentee | Title | Type | |
| 354,498 | Dec. 14, 1886 | P. Van Den Kerchove | Device for Cooling Machine Tools | metal lathe accessories and attachments | |
| 787,339 | Apr. 11, 1905 | R.F. Massa | Attachment for Drop Hammers | drop hammers | |
| 963,903 | Jul. 12, 1910 | G.A. Lane | Pipe Tongs | chain and strap wrenches | |
| 2,063,756 | Dec. 08, 1936 | E.G. Roehm, M. Romaine | Broaching Machine | broaching machines | |