HF

Haruhisa Fujisawa

HC Hitachi Koki Co.: 29 patents #15 of 888Top 2%
KC Koki Holdings Co.: 1 patents #124 of 215Top 60%
📍 Hitachinaka, JP: #141 of 2,447 inventorsTop 6%
Overall (All Time): #123,673 of 4,157,543Top 3%
30
Patents All Time

Issued Patents All Time

Showing 1–25 of 30 patents

Patent #TitleCo-InventorsDate
11626807 DC power supply device Takuya Yoshinari, Yuji Kishima, Eiji Nakayama, Kazuhiko Funabashi 2023-04-11
9496536 Backpack-type power supply Takuya Yoshinari, Yuji Kishima, Naoto Wakatabe 2016-11-15
9391305 Backpack-type power supply including operation portion Takuya Yoshinari, Takafumi Itoh 2016-07-12
9345156 Power supply device Masayuki Ogura, Shinji Watanabe, Kazuhiko Funabashi, Takuhiro Murakami, Yasushi Nakano +3 more 2016-05-17
9337763 Power tool system and power supply device Kazuhiko Funabashi, Nobuhiro Takano, Yoshikazu Kawano, Yasushi Nakano, Yuki Horie +2 more 2016-05-10
9236588 Battery pack and power tool provided with the same Hiroyuki Hanawa, Keita Saitou 2016-01-12
8895182 Battery pack and power tool provided with the same Hiroyuki Hanawa, Keita Saitou 2014-11-25
8765280 Battery pack and battery-driven power tool using the same Takashi Ueda, Junichi Toukairin, Hiroyuki Hanawa, Keita Saitou 2014-07-01
D689432 Rechargeable battery Takafumi Itoh, Kenichi Yamada, Tomoyuki Kawahara 2013-09-10
7932694 Battery charger operable for selective one of a plurality of power supplies Shinji Watanabe, Yasushi Nakano, Nobuhiro Takano 2011-04-26
7743955 Combustion type power tool having fan Tomomasa Nishikawa 2010-06-29
7500587 Combustion-type power tool Yoshitaka Akiba, Tomomasa Nishikawa, Kunio Yamamoto, Shinki Ohtsu 2009-03-10
7484481 Combustion-type power tool having switch protection arrangement Yoshitaka Akiba 2009-02-03
7467739 Combustion-powered, fastener-driving tool generating sparks in succession when triggered Yoshitaka Akiba, Nobuhiro Takano, Kenro Ishimaru, Tomomasa Nishikawa 2008-12-23
7455036 Combustion type power tool having fin in low turbulent combustion region within combustion chamber Tomomasa Nishikawa, Yoshitaka Akiba 2008-11-25
D575224 Battery pack Takeshi Taniguchi, Masanori Okada 2008-08-19
7387092 Combustion-type power tool having cooling arrangement Tomomasa Nishikawa, Yoshitaka Akiba 2008-06-17
7316209 Combustion type power tool having buffer piece Yoshitaka Akiba, Tomomasa Nishikawa 2008-01-08
7305941 Combustion type power tool having motor suspension arrangement Yoshitaka Akiba 2007-12-11
7305940 Combustion-type power tool having ignition proof arrangement Tomomasa Nishikawa, Yasuki Ohmori, Shinki Ohtsu, Kunio Yamamoto, Yoshitaka Akiba 2007-12-11
7293541 Combustion-type power tool having ignition proof arrangement Tomomasa Nishikawa, Shinki Ohtsu 2007-11-13
7237515 Combustion-type power tool having cooling arrangement Tomomasa Nishikawa, Yoshitaka Akiba 2007-07-03
7225768 Combustion type power tool having buffer piece Yoshitaka Akiba, Tomomasa Nishikawa 2007-06-05
7210431 Combustion-type power tool with exhaust gas flow regulating rib Tomomasa Nishikawa, Yoshitaka Akiba, Shoichi Hirai 2007-05-01
7131404 Combustion-type power tool having gas canister cooling arrangement Tomomasa Nishikawa, Yoshitaka Akiba, Shoichi Hirai 2006-11-07