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| All Patents in class 30/DIG.3 | |||||
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| Number | Date | Patentee | Title | Type | |
| 471,283 | Mar. 22, 1892 | E. Weiland, H.C. Volk | Device for Opening Letters | letter openers | |
| 591,651 | Oct. 12, 1897 | B.F. Lantz | Envelop Opener | envelope openers | |
| 765,391 | Jul. 19, 1904 | E. Long | Card Bevel Edger | printer | |