Patent:US4629429
Patent: | US 4629429 |
Titel: | Abacus with each counter held in position by friction or magnetic attraction |
Datum: | 16.12.1986 |
Ort: | |
Land: | USA |
Person: | Horie, Tsuyoshi (7-15, Iwamoto-cho 3-chome,, Chiyoda-ku, |
Firma: | |
Links im Rechnerlexikon: | Kugelrechner |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | ![]() ![]() |
- DATUM: 16.12.1986
- TITEL: Abacus with each counter held in position by friction or magnetic attraction
- PERSON: HORIE TSUYOSHI