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Patent:US2528633
| Patent: | US 2528633 |
| Title: | Roofing and calculating square |
| Date: | 07.11.1950 |
| Place: | |
| Country: | USA |
| Person: | Anderson Guy |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2528633 (espacenet), US2528633 (uspto) |
Aus der Patentschrift US2528633
- DATUM: 07.11.1950
- TITEL: Roofing and calculating square
- PERSON: W F MCKINLEY