Patent:US884729
Patent: | US 884729 |
Title: | Computing Slide Rule |
Date: | 14.04.1908 |
Place: | |
Country: | USA |
Person: | H. Gröndahl |
Company: | |
Internal Links: | Rechenschieber |
Keywords: | |
Link to the patent office: (without guarantee) | US884729 (espacenet), US884729 (uspto) |