| Patent: | US 1508257 |
| Titel: | Calculating Machine |
| Datum: | 08.11.1919 |
| Ort: | Philadelphia |
| Land: | USA |
| Person: | Rosenthal, Richard (P), Schuman, Otto P. (P) |
| Firma: | Rapid Calculator Co. (P) |
| Links im Rechnerlexikon: | Sprossenrad |
| Schlagworte: | |
| Link zum Patentamt: (ohne Garantie) |  US1508257 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=US1508257) (espacenet), US1508257 (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=1508257.PN.&OS=PN/1508257&RS=PN/1508257) (uspto) |
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