Inventor

KOYAMADA YAHEI

JP7 patents

⚠️ This page may combine multiple inventors who share the name “KOYAMADA YAHEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ANDO ELECTRIC

2 patents

US5500762AMar 19, 1996

Light frequency control apparatus

ANDO ELECTRIC29 citations91

US5581389ADec 3, 1996

Light frequency control apparatus

ANDO ELECTRIC4 citations61

NIPPON TELEGRAPH & TELEPHONE

1 patent

US4126837ANov 21, 1978

Impedance element and band-rejection filter using the same

NIPPON TELEGRAPH & TELEPHONE40 citations90

FURUKAWA ELECTRIC CO LTD

1 patent

US7742671B2Jun 22, 2010

Optical fiber

FURUKAWA ELECTRIC CO LTD8 citations83

YOKOGAWA ELECTRIC CORP

1 patent

US7873273B2Jan 18, 2011

Apparatus for measuring the characteristics of an optical fiber

YOKOGAWA ELECTRIC CORP18 citations82

MITSUBISHI RAYON CO

1 patent

US6606441B2Aug 12, 2003

Plastic optical fiber, optical fiber cable and optical transmission device

MITSUBISHI RAYON CO9 citations70

NEUBREX CO LTD

1 patent

US11112358B2Sep 7, 2021

Brillouin scattering measurement method and Brillouin scattering measurement device

NEUBREX CO LTD1 citations61