| Name | Street | Town | State | From | To |
|---|---|---|---|---|---|
| Blittkowski, Gustav Adolph, and Hoffman, Frederick William | New York City | New York |
| Patent | Date | Remarks |
|---|---|---|
| 14,488 | March 25, 1856 | Patent drawing Specification Specification 2nd page |
| 14,710 | April 22, 1856 | Patent drawing Patent drawing 2nd page Specification Specification 2nd page Specification 3rd page |
| 17,136 | April 28, 1857 | Patent drawing Specification Specification 2nd page |
| Contract | for |
|---|---|
| Product |
|---|
|
Non production was made or is known |
