Patent:US590972
Patent: | US 590972 |
Title: | Duplicate-printing mechanism for adding-machines |
Date: | 1989 |
Place: | Chicago |
Country: | USA |
Person: | Felt, Dorr E. (P) |
Company: | |
Internal Links: | |
Keywords: | |
Link to the patent office: (without guarantee) | US590972 (espacenet), US590972 (uspto) |
(There is currently no text in this page)