KO

Keiichi Okai

JA Japan Aerospace Exploration Agency: 2 patents #70 of 546Top 15%
NU Nihon University: 2 patents #10 of 233Top 5%
Overall (All Time): #2,136,665 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7555893 Aircraft propulsion system Takeshi Tagashira, Ryoji Yanagi, Hiroshi Nomura 2009-07-07
7423405 Electromagnetic rotating machine Takeshi Tagashira, Ryoji Yanagi, Hiroshi Nomura 2008-09-09