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| All Patents in class 70/457 | |||||
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| Number | Date | Patentee | Title | Type | |
| 431,859 | Jul. 08, 1890 | J.A. Traut | Key chain | ||
| 1,939,023 | Dec. 12, 1933 | E.W. Pritchard | Key Holder | ||
| 2,312,204 | Feb. 23, 1943 | F. Weindel, Jr. | Identification device for key rings or chains and the like | ||