Patent:US2142892
Patent: | US 2142892 |
Title: | Calculating Machine |
Date: | 03.01.1939 |
Place: | |
Country: | USA |
Person: | Friden, Carl Mauritz Fredrick (P) |
Company: | Marchant (P) |
Internal Links: | |
Keywords: | |
Link to the patent office: (without guarantee) | US2142892 (espacenet), US2142892 (uspto) |