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Patents for Clem Harper | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 443,216 | Dec. 23, 1890 | J.S. Urban, F.J. Biel | Wrench | |
![]() | 451,810 | May 05, 1891 | C.D. Cowgill | Bevel Attachment for Folding Rules |