Hitachi Patent Division (1 Jan 1930 Jahr – 31 Dez 1930 Jahr)
Beschreibung:
In 1930 Hitachi developed a division with information on every patent granted in Japan since 1889. This made it easier for Japanese companies to select which patents they needed to borrow from others.
Zugefügt zum Band der Zeit:
Japan Science
Datum:
Abbildungen:
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