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| Patents for John A. Conn | |||||
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| Number | Date | Patentee | Title | Type | |
| 111,351 | Jan. 31, 1871 | J. Kirby | Improvement in bung-extractors | ||
| 111,352 | Jan. 31, 1871 | J. Kirby | Improvement in bungs | ||
| 125,765 | Apr. 16, 1872 | D. Stanley | Improvement in molding cutter-heads | cutterheads | |