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| Patents for John H. Hopkins | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 191,239 | May 29, 1877 | J.H. Hopkins | Improvement in scroll-sawing machines | |
![]() | 210,607 | Dec. 10, 1878 | J.H. Hopkins | Improvement in scroll-sawing machines | |