YI

Yoshitaro Ishii

HI Hitachi: 3 patents #133 of 2,935Top 5%
Overall (1989): #5,979 of 140,708Top 5%
3
Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4880474 Method and apparatus for operating vacuum cleaner Haruo Koharagi, Kazuo Tahara, Tsunehiro Endo, Kunio Miyashita, Fumio Jyoraku +5 more 1989-11-14
D302878 Electric vacuum cleaner Shigetaka Kimura, Kohichi Hasegawa, Masao Sunagawa, Fumio Jyoraku 1989-08-15
4809394 Vacuum cleaner having a blower facility structure Hisao Suka, Akira Iwao, Kazuhiro Kubota, Masao Sunagawa 1989-03-07