KK

Keiji Kawahara

HI Hitachi: 7 patents #5,859 of 28,497Top 25%
HS Hitachi Automotive Systems: 2 patents #689 of 1,636Top 45%
HC Hitachi Car Engineering Co.: 2 patents #204 of 465Top 45%
HA Hitachi Astemo: 1 patents #649 of 1,276Top 55%
📍 Hitachinaka, JP: #494 of 2,447 inventorsTop 25%
Overall (All Time): #483,630 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDate
12341390 Stator of electric motor and manufacturing method for stator of electric motor Masato Higuma, Yasuhiko Kimura, Kenichi Nakayama 2025-06-24
9095924 Welded construction and resistance welding method Shin Onose, Hiroshi Fujimoto, Kenta Hasegawa 2015-08-04
9000582 Power semiconductor module and power conversion device Shinji Hiramitsu, Atsushi Koshizaka, Masato Higuma, Hiroshi Tokuda 2015-04-07
8302275 Iron core and method of manufacturing the same and apparatus for manufacturing the same Atsushi Koshizaka, Toshiaki Ueda, Yuichi Kirihara, Susumu Sasaki 2012-11-06
8016214 Fuel injection valve and method for forming orifice thereof Masato Higuma, Kenichi Gunji, Atsushi Sekine 2011-09-13
7874070 Injection valve and method of making orifice Kenichi Gunji, Shuichi Shimizu, Atsushi Sekine, Masafumi Nakano 2011-01-25
7315104 Iron core and method of manufacturing the same and apparatus for manufacturing the same Atsushi Koshizaka, Toshiaki Ueda, Yuichi Kirihara, Susumu Sasaki 2008-01-01
6976381 Fuel injector, nozzle body, and manufacturing method of cylindrical part equipped with fluid passage Atsushi Koshizaka, Atsushi Sekine, Mizuho Yokoyama 2005-12-20
6710745 High-frequency communication apparatus and method of manufacturing the same Atsushi Koshizaka, Shirou Oouchi, Mizuho Yokoyama 2004-03-23
6580395 High-frequency communication apparatus and method of manufacturing the same Atsushi Koshizaka, Shirou Oouchi, Mizuho Yokoyama 2003-06-17