Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Combi › Masatoshi Doi
MD

Masatoshi Doi — 7 Patents

COCombi: 7 patents #23 of 161Top 15%
Tokyo, JP: #20,807 of 90,295 inventorsTop 25%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
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.

Patents per Year

Patents granted per year, 1990 to 2005Bar chart with a peak of 5 patents in 2004.peak 51990: 1 patents19902004: 5 patents20042005: 1 patents2005

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
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

Frequent Collaborators

Yuuki Shibata6 shared
Fumie Shibata6 shared
Keita Tanaka4 shared
Yuko Inomata3 shared
Kazumi Minoguchi2 shared
Hitoshi Katou1 shared

Nearby-Ranked Inventors

Yu Du7
WOOSEUP YOUM7
Il Jae Moon7
Jacob Tyler Crosby7
Manamohan D. Mysore7
Timothy Batty7
Ty Hessler7
Justin Cole7
Xiaorong Chen7