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| Patents for John H. Blaisdell | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 162,343 | Apr. 20, 1875 | J.H. Blaisdell | Improvement in molding-machines | |
| 515,313 | Feb. 20, 1894 | J.H. Blaisdell | Inside molding-machine | ||