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Dive into the research topics where Takao Koyama is active.

Publication


Featured researches published by Takao Koyama.


Archive | 1999

Ball point pen filled with erasable ink

Takao Koyama


Archive | 2003

Ball-point pen tip and ball-point pen

Toshifumi Kamiya; Takao Koyama; Masaaki Morita; 隆雄 小山; 昌明 森田; 俊史 神谷


Archive | 2004

Liquid for electrophoretic display and display medium and display employing it

Yasuaki Ogiwara; Atsushi Sato; Takahiro Osada; Takao Koyama


Archive | 2002

Bright ink composition for writing utensil

Mitsuhiko Furusawa; Kyoko Kobayashi; Takao Koyama; 光彦 古澤; 隆雄 小山; 京子 小林


Archive | 2004

Refill for correction pen and refill unit

Kyoko Kobayashi; Makoto Ono; Akira Fukai; Takao Koyama; Hitoshi Nakamura; Kei Omoto; Tadashi Koriki


Archive | 2002

Ink-storing body for writing utensil

Kazuhisa Kirita; Toshimi Kamitani; Takao Koyama


Archive | 2001

FREE-INK TYPE WRITING INSTRUMENT

Takao Koyama; Kazuhisa Kirita; Atsushi Iwasa


Archive | 1998

Non-erasable pencil lead

Takao Koyama


Archive | 1988

Process for producing carbon heat generator

Takamasa Kawakubo; Takao Koyama


Archive | 2005

Oil-based gel ink composition and coating device using the ink composition

Takao Koyama; 隆雄 小山

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