| Name | Street | Town | State | From | To |
|---|---|---|---|---|---|
| McCosh, Samuel |   | Pittsburgh | Pennsylvania | 1852 | 1855 |
| Patent | Date | Remarks |
|---|---|---|
|   |   |   |
| Contract | for |
|---|---|
|   |   |
| Product |
|---|
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Formed by the Pittsburgh Gun Works together with Jacob F. Brant in 1852. They separated in 1855 |