Inventor
YAMAMOTO FUMIHIKO
JP12 patents
⚠️ This page may combine multiple inventors who share the name “YAMAMOTO FUMIHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
7 patentsUS5546483AAug 13, 1996
Integrated optical waveguide circuit and optical branch line test system using the same
NIPPON TELEGRAPH & TELEPHONE114 citations97
US10871648B2Dec 22, 2020
Optical fiber design method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US10545333B2Jan 28, 2020
Photonic crystal fiber and high-power light transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations51
US10539784B2Jan 21, 2020
Photonic crystal fiber and high-power light transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations51
US10816722B2Oct 27, 2020
Optical fiber design method
NIPPON TELEGRAPH & TELEPHONE0 citations39
US10444428B2Oct 15, 2019
Optical fiber and optical transmission system
NIPPON TELEGRAPH & TELEPHONE0 citations39
US10310177B2Jun 4, 2019
Photonic crystal fiber
NIPPON TELEGRAPH & TELEPHONE0 citations39
ASAHI CHEMICAL IND
4 patentsUS4126589ANov 21, 1978
Method for preparation of cation exchange membranes
ASAHI CHEMICAL IND30 citations81
US5015707AMay 14, 1991
Preparation of poly-β-alanine from acrylamide
ASAHI CHEMICAL IND6 citations72
US4855365AAug 8, 1989
Poly-β-alanine compound, a process for producing the same and a polyacetal resin composition containing a poly-β-alanine compound
ASAHI CHEMICAL IND7 citations72
US4318850AMar 9, 1982
Carboxamide type azomethine pigment
ASAHI CHEMICAL IND1 citations45