Hitachi Patent Division (1 янв 1930 г. – 31 дек 1930 г.)
Описание:
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.
Добавлено на ленту времени:
Japan Science
Дата:
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