1890年，这个非凡的发明诞生于挪威专利局职员John Vaaler的孩子手上。
This amazing invention is a brain child of John Vaaler a Norwegian patent clerk in 1890.
专利规则由挪威工业产权局颁布，自1980年1月1日起开始实施。
These Regulations are enacted by Norwegian Industrial Property Office, and date of Entry into force is January 1, 1980.
专利规则由挪威工业产权局颁布，自1980年1月1日起开始实施。
These Regulations are enacted by Norwegian Industrial Property Office, and date of Entry into force is January 1, 1980.
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