KF

Kunihiko Fukuyama

RC Rion Co.: 2 patents #29 of 139Top 25%
Overall (All Time): #2,359,824 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4475230 Hearing aid Takuo Yamamoto, Hiromi Masaike 1984-10-02
4361733 Hard-of-hearing aid appliance Yozo Marutake, Tatsuro Fukutome, Yasuo Inaba 1982-11-30