Patent:GB187402879
Patent: | GB 187402879 |
Titel: | Ready Reckoner |
Datum: | 21.08.1874 |
Ort: | Großbritannien |
Land: | Großbritannien |
Person: | Burkard, A. (P) |
Firma: | |
Links im Rechnerlexikon: | |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | GB187402879 |
"A ready-reckoner or apparatus for obtaining the product of two numbers consists of a flat box, the cover of which is formed with a transverse control slot or row of apertures and with two slots at the bottom. ..."
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