SO

Souji Onuki

PK Pentel Kabushiki Kaisha: 1 patents #76 of 170Top 45%
Overall (All Time): #3,615,902 of 4,157,543Top 90%
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Patent #TitleCo-InventorsDate
6065889 Side-knock type mechanical pencil Shigeki Maruyama 2000-05-23