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Hirohumi Doi

DC Dai-Ichi Electric Co.: 3 patents #2 of 12Top 20%
MC Mitsui Engineering & Shipbuilding Co.: 3 patents #50 of 496Top 15%
TC The Tsurumi Seiki Co.: 3 patents #1 of 19Top 6%
📍 Tamano, JP: #33 of 123 inventorsTop 30%
Overall (All Time): #1,557,773 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
7866630 Winding mechanism with tension control function and trawling apparatus Shuji Ueki, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh 2011-01-11
7775383 Hoisting device with vertical motion compensation function Shuji Ueki, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh 2010-08-17
7681748 Hoisting device with vertical motion compensation function Shuji Ueki, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh 2010-03-23