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Patent:GB187402879


Brevetto:GB 187402879
Titolo:Ready Reckoner
Data:21.08.1874
Luogo:Großbritannien
Nazione:Gran Bretagna
Persona:Burkard, A. (P)
Ditta:
Link interni:
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Link al brevetto:
(without guarantee)
 GB187402879

Revisione 10:59, 3. Ott 2013 Versione attuale
Riga 1: Riga 1:
-"A ready-reckoner or apparatue for obtaining the product of two numbers consists of a flat box, the cover of which is formed with transverse control slot or row of appertures and with two slots at the bottom. ..."+"
(Patent nicht ertteilt?) (Patent nicht ertteilt?)

Versione attuale

"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. ..."

(Patent nicht ertteilt?)