Patent:US4448579
Patent: | US 4448579 |
Title: | Arithmetic instruction apparatus |
Date: | 15.05.1984 |
Place: | |
Country: | USA |
Person: | Currie, Richard A. (833 S. Burgess Dr., Baton Rouge, LA |
Company: | |
Internal Links: | Kugelrechner, Lehrmittel |
Keywords: | |
Link to the patent office: (without guarantee) | ![]() ![]() |
- DATUM: 15.05.1984
- TITEL: Arithmetic instruction apparatus
- PERSON: CURRIE RICHARD A