| Name | Street | Town | State | From | To |
|---|---|---|---|---|---|
| M'Mahon, John | 366 water street | New York | New York | 1841 | 1842 |
| M'Mahon, John | 87 Oliver street (eventually only home address) | New York | New York | 1844 | 1845 |
| M'Mahon, John | 368 Water street | New York | New York | 1845 | 1849 |
| Patent | Date | Remarks |
|---|---|---|
| Contract | for |
|---|---|
| Product |
|---|
|
Gun and lock smith, see New York City Directory for 1841, 1842, 1844-1845, 1845 & 1846,
gunsmith 1847-1848, 1848-1849. |
