Patent:US4419081
Patent: | US 4419081 |
Title: | Mathematical teaching/learning aid and method of use |
Date: | 06.12.1983 |
Place: | 6928 E. Sunnyvale Rd., Scottsdale |
Country: | USA |
Person: | Steinmann, Phyllis R. |
Company: | |
Internal Links: | Lehrmittel |
Keywords: | |
Link to the patent office: (without guarantee) | ![]() ![]() |
- DATUM: 06.12.1983
- TITEL: Mathematical teachinglearning aid and method of use
- PERSON: STEINMANN PHYLLIS R