YH

Yoshirou Hirai

CC Citizen Holdings Co.: 1 patents #40 of 115Top 35%
CC Citizen Watch Co.: 1 patents #5 of 23Top 25%
HI Hitachi: 1 patents #412 of 1,411Top 30%
Overall (2016): #175,686 of 481,213Top 40%
1
Patents 2016

Issued Patents 2016

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9395692 Hairspring material for mechanical timepiece and hairspring using the same Shinichi Matsumoto, Kenji Tsuchiya, Shinji Yamamoto 2016-07-19