| Name | Street | Town | State | From | To |
|---|---|---|---|---|---|
| Swyney, John | Charlestown, Middlesex county | Massachusetts | 1855 |
| Patent | Date | Remarks |
|---|---|---|
| 13,474 | August 21, 1855 | Improvement in Breech-Loading Magzine Fire-Arms, assigned to John Swyney and James Dandridge, Bostonm Massachusetts view patent |
| Contract | for |
|---|---|
| Product |
|---|
|
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