| Name | Street | Town | State | From | To |
|---|---|---|---|---|---|
| Gruler, Joseph |   |   |   | 1850s |   |
| Patent | Date | Remarks |
|---|---|---|
|   |   |   |
| Contract | for |
|---|---|
|   |   |
| Product |
|---|
|
No much is known. He was German origine and connected to the Manhattan Firarms Manufacturing Company. |