BH

by Takayasu Miwa, heir

KC Kowa Company: 1 patents #310 of 562Top 60%
Overall (All Time): #4,097,228 of 4,157,543Top 100%
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Patent #TitleCo-InventorsDate
4290954 Tetrahydroxanthone derivatives Kazuhiro Onogi, Hisashi Kunieda, Kiyoshi Kawamura, Masami Shiratsuchi, Masahiko Nagakura +1 more 1981-09-22