KK

Katsunori Kojima

HI Hitachi: 2 patents #771 of 3,950Top 20%
Overall (2002): #56,438 of 266,432Top 25%
2
Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6495786 Vacuum exhaust element of vacuum switch Masashige Tsuji, Ayumu Morita, Toru Tanimizu, Yuichi Ishikawa, Yoshiharu Yotsumoto 2002-12-17
6426627 Vacuum switch including vacuum-measurement devices, switchgear using the vacuum switch, and operation method thereof Shuuichi Kikukawa, Tooru Tanimizu, Ayumu Morita, Masashige Tsuji 2002-07-30