| 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) |  US4629429 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=US4629429) (espacenet), US4629429 (http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/FPTO/srchnum.htm&r=1&f=G&l=50&s1=4629429.PN.&OS=PN/4629429&RS=PN/4629429) (uspto) |
Aus der Patentschrift US4629429
- DATUM: 16.12.1986
- TITEL: Abacus with each counter held in position by friction or magnetic attraction
- PERSON: HORIE TSUYOSHI