Hatsumei gojūnenshi
By: Wakasugi Kichigorō cho
Edition: Shinpan
Publisher: Masu Shobō
Published: 1947
Place of publication: Tōkyō
Language: jpn
Number of pages: 276
Subjects: Patents; History; Technology
Other titles: Shinpan hatsumei gojūnenshi.; Hatsumei 50-nenshi.