Patent:US1138793
Patent: | US 1138793 |
Title: | Adding Machine |
Date: | 11.05.1915 |
Place: | |
Country: | USA |
Person: | Rinsche, Frank Charles (P) |
Company: | |
Internal Links: | |
Keywords: | |
Link to the patent office: (without guarantee) | US1138793 (espacenet), US1138793 (uspto) |