Hiroaki Okabayashi

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Mechanical pencil lead protection pipe with protuberance
- Patent number 5,085,534
- Issue date Feb 4, 1992
- Pentel Kabushiki Kaisha
- Kamakura Kenichi
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES