HT

Hidekazu Tohara

OC Osaka Gas Co.: 1 patents #252 of 689Top 40%
Overall (All Time): #3,904,429 of 4,157,543Top 95%
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Patent #TitleCo-InventorsDate
4931163 Pitch fluoride Nobuatsu Watanabe, Yuji Matsumura, Hiroyuki Fujimoto 1990-06-05