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| All Patents in class 493/375 | |||||
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| Number | Date | Patentee | Title | Type | |
| 593,218 | Nov. 09, 1897 | C. Holly | Looping Machine | book binder | |
| 936,898 | Oct. 12, 1909 | C. Holly | Looping Machine | book binder | |
| 2,329,669 | Sep. 14, 1943 | H.B. Tuthill | Label attaching machine | ||