HM

Hiroshi Miyagawa

ME Meidensha: 6 patents #38 of 555Top 7%
TL Toyota Central R&D Labs: 5 patents #200 of 1,657Top 15%
SC Shinko Electric Industries Co.: 4 patents #182 of 723Top 30%
EX ExxonMobil: 3 patents #3,051 of 10,161Top 35%
TO Toyota: 3 patents #8,352 of 26,838Top 35%
MC Mitsui Mining & Smelting Co.: 2 patents #281 of 838Top 35%
KG Kabushiki Kaisha Gemvac: 2 patents #4 of 9Top 45%
SO Sony: 2 patents #12,963 of 25,231Top 55%
Canon: 2 patents #12,681 of 19,416Top 70%
NE Nec: 1 patents #7,889 of 14,502Top 55%
HM Hitachi Maxell: 1 patents #659 of 1,211Top 55%
DE Denso: 1 patents #6,940 of 11,792Top 60%
Overall (All Time): #140,714 of 4,157,543Top 4%
27
Patents All Time

Issued Patents All Time

Showing 26–27 of 27 patents

Patent #TitleCo-InventorsDate
4429197 Vacuum power interrupting device Shinzo Sakuma, Hifumi Yanagisawa, Kazuo Tokuhata 1984-01-31
4421961 Vacuum circuit breaker Shinzo Sakuma, Hifumi Yanagisawa, Kazuo Tokuhata 1983-12-20