Masumi Fukuma

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Evaluation method for insulation performance of insulator
- Patent number 10,677,835
- Issue date Jun 9, 2020
- Sumitomo Electric Industries, Ltd.
- Yoitsu Sekiguchi
- G01 - MEASURING TESTING
Information Patent Grant
Reflection monitor optical fiber coupler manufacturing system and m...
- Patent number 5,329,600
- Issue date Jul 12, 1994
- Sumitomo Electric Industries, Ltd.
- Eisuke Sasaoka
- G02 - OPTICS
Information Patent Grant
Method and apparatus for producing optical fiber coupler
- Patent number 5,205,851
- Issue date Apr 27, 1993
- Sumitomo Electric Industries, Ltd.
- Hiroshi Suganuma
- G02 - OPTICS
Information Patent Grant
Method for manufacturing a fiber type coupler
- Patent number 5,167,685
- Issue date Dec 1, 1992
- Sumitomo Electric Industries, Ltd.
- Masumi Fukuma
- G02 - OPTICS
Information Patent Grant
Wavelength selective optical fiber coupler
- Patent number 5,129,020
- Issue date Jul 7, 1992
- Sumitomo Electric Industries, Ltd.
- Masayuki Shigematsu
- G02 - OPTICS
Information Patent Grant
Method of manufacturing optical branching and coupling device
- Patent number 5,098,459
- Issue date Mar 24, 1992
- Sumitomo Electric Industries, Ltd.
- Masumi Fukuma
- G02 - OPTICS
Information Patent Grant
Optical transmission line for use in an optical communication system
- Patent number 5,077,814
- Issue date Dec 31, 1991
- Sumitomo Electric Industries, Ltd.
- Masayuki Shigematsu
- G02 - OPTICS
Information Patent Grant
Method for manufacturing a fiber type coupler
- Patent number 5,046,804
- Issue date Sep 10, 1991
- Sumitomo Electric Industries, Ltd.
- Masumi Fukuma
- G02 - OPTICS
Information Patent Grant
Method for manufacturing a fiber type coupler
- Patent number 5,013,117
- Issue date May 7, 1991
- Sumitomo Electric Industries, Ltd.
- Masumi Fukuma
- G02 - OPTICS
Information Patent Grant
Optical fiber cable preventing water from spreading toward cable in...
- Patent number 4,802,732
- Issue date Feb 7, 1989
- Sumitomo Electric Industries, Ltd.
- Masumi Fukuma
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
EVALUATION METHOD FOR INSULATION PERFORMANCE OF INSULATOR
- Publication number 20190120893
- Publication date Apr 25, 2019
- Sumitomo Electric Industries, Ltd.
- Yoitsu SEKIGUCHI
- G01 - MEASURING TESTING

Masumi Fukuma

Person

Patents Grantslast 30 patents

Evaluation method for insulation performance of insulator

Reflection monitor optical fiber coupler manufacturing system and m...

Method and apparatus for producing optical fiber coupler

Method for manufacturing a fiber type coupler

Wavelength selective optical fiber coupler

Method of manufacturing optical branching and coupling device

Optical transmission line for use in an optical communication system

Method for manufacturing a fiber type coupler

Method for manufacturing a fiber type coupler

Optical fiber cable preventing water from spreading toward cable in...

Patents Applicationslast 30 patents

EVALUATION METHOD FOR INSULATION PERFORMANCE OF INSULATOR