Masatoshi Doi — 7 Patents at Combi

Masatoshi Doi has been granted 7 US patents while listed as an inventor at Combi. The first was granted in 1990 and the most recent in March 2005. Masatoshi Doi ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Masatoshi Doi in Tokyo, JP.

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Showing 1–7 of 7 patents

Patent #	Title	Co-Inventors	Date
D502414	Thermometer	Fumie Shibata, Yuuki Shibata, Yuko Inomata	2005-03-01
D498827	Baby baths	Fumie Shibata, Yuuki Shibata, Keita Tanaka, Yuko Inomata	2004-11-23
D491646	Potty	Fumie Shibata, Yuuki Shibata, Keita Tanaka, Kazumi Minoguchi	2004-06-15
D491645	Toilet trainer	Fumie Shibata, Yuuki Shibata, Keita Tanaka, Kazumi Minoguchi	2004-06-15
D491420	Child fork	Fumie Shibata, Yuuki Shibata, Makoto Oyama	2004-06-15
D489538	Bath chair for infant	Fumie Shibata, Yuuki Shibata, Keita Tanaka, Yuko Inomata	2004-05-11
D308656	Baby stroller	Takehiko Takahashi, Hitoshi Katou, Tomihiro Kaneko	1990-06-19

Masatoshi Doi — 7 Patents

Patents per Year

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