Patent:CN2032343u
Patent: | CN 2032343u |
Titel: | Slide Rule For Children Doing Addition And Subtraction |
Datum: | 08.02.1989 |
Ort: | |
Land: | China |
Person: | Yukun Liu |
Firma: | |
Links im Rechnerlexikon: | Rechenschieber |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | CN2032343u |
- DATUM: 08.02.1989
- TITEL: SLIDE RULE FOR CHILDREN DOING ADDITION AND SUBTRACTION
- PERSON: LIU YUKUN CN