HN

Hirokazu Nagaoka

Sumitomo Electric Industries: 2 patents #9,741 of 21,551Top 50%
Overall (All Time): #2,163,405 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7306640 Vacuum cleaner Yoshiki Kuroki, Seiji Yamaguchi, Tomonori Kato, Masashi Okushima, Yuichi Shimizu +7 more 2007-12-11
7047593 Vacuum cleaner capable of compressing dirt Hidenori Kitamura, Saburo Kajikawa, Masakazu Onda, Seiji Ishikawa, Yasunori Tsuzaki +3 more 2006-05-23