| Patent: | US 2533580 |
| Title: | Calculator |
| Date: | 12.12.1950 |
| Place: | |
| Country: | USA |
| Person: | Hall, E. F. (P) |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2533580 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=US2533580) (espacenet), US2533580 (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=2533580.PN.&OS=PN/2533580&RS=PN/2533580) (uspto) |
Aus der Patentschrift US2533580
- DATUM: 12.12.1950
- TITEL: Calculator