簿冊

The law and practice relating to the prolongation of the term of letters patent for inventions

https://www.digital.archives.go.jp/file/1145535

[簿冊]The law and practice relating to the prolongation of the term of letters patent for inventionsE015818国立公文書館デジタルアーカイブhttps://www.digital.archives.go.jp/file/1145535参照 2026-05-15

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