[アメリカ合衆国特許証のコピー : 特許番号2,817,366] [アメリカ合衆国特許証のコピー : 特許番号2,817,366]アメリカ ガッシュウコク トッキョ ショウ ノ コピー : トッキョ バンゴウ 2,817,366

National Diet Library

The National Diet Library (NDL), founded in 1948, is the library which belongs to the Diet. The NDL assists the activities of the National Diet. The Library collects and conserves materials and information both from Japan and abroad, serving as a foundation of knowledge and culture and providing library services to administrative and judicial entities and Japanese citizens.