Hideaki Oikawa

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Patents Grantslast 30 patents

Information Patent Grant
Mechanical pencil with latching chuck actuator
- Patent number 4,884,911
- Issue date Dec 5, 1989
- Pentel Kabushiki Kaisha
- Hideaki Oikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Automatic lead advance for mechanical pencils
- Patent number 4,838,721
- Issue date Jun 13, 1989
- Pentel Kabusiki Kaisha
- Hideaki Oikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES