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Koyama Takao

Mitsubishi

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Publication

Featured researches published by Koyama Takao.

Archive | 2002

Direct liquid type writing implement

Koyama Takao; Kirita Kazuhisa; Iwasa Atsushi

Archive | 2004

Ink holding member for writing utensil

Koyama Takao; Kamiya Toshifumi; Ogiwara Yasuaki

Archive | 1999

Writing instrument for children

Koyama Takao; Konose Yoshiomi

Archive | 1998

Writing instrument without cap

Koyama Takao; Ogiwara Yasuaki; Iwasa Atsushi; Kamiya Toshifumi; Kirita Kazuhisa

Archive | 1985

METHOD OF PRODUCING CARBON HEATER

Kawakubo Takamasa; Koyama Takao

Archive | 2003

INK HOUSING MEMBER FOR WRITING INSTRUMENT

Koyama Takao; Kamiya Toshifumi; Ogiwara Yasuaki

Archive | 1997

Pencil lead directly giving non-erasable lines, marks, etc.

Koyama Takao

Archive | 2004

INK STORAGE MEMBER FOR WRITING UTENSIL

Koyama Takao; Kamiya Toshifumi; Ogiwara Yasuaki; Tsunoda Yuzo; Ono Toshio

Archive | 2001

Schreibgerät vom freien Tintentyp

Koyama Takao; Kirita Kazuhisa; Iwasa Atsushi

Archive | 2005

WRITING UTENSIL OF INK EXHAUSTION DETECTION TYPE

Koyama Takao; Kamiya Toshifumi; Osada Takahiro; Ami Kazuhiro

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Collaboration

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Ogiwara Yasuaki

Mitsubishi

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Iwasa Atsushi

Mitsubishi

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Kirita Kazuhisa

Mitsubishi

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Kawakubo Takamasa

Mitsubishi

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Odajima Hideo

Mitsubishi

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Konose Yoshiomi

Mitsubishi

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