Tsutomu Kubo

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical transmission system and filter penalty reduction method
- Patent number 11,942,755
- Issue date Mar 26, 2024
- Nippon Telegraph and Telephone Corporation
- Kohei Saito
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
OSNR spectrum estimation apparatus, OSNR spectrum estimation method...
- Patent number 11,424,824
- Issue date Aug 23, 2022
- Nippon Telegraph and Telephone Corporation
- Hiroki Kawahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier, optical transmission system, and optical cable f...
- Patent number 11,329,445
- Issue date May 10, 2022
- Nippon Telegraph and Telephone Corporation
- Takashi Kotanigawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Dispersion compensation designing device, dispension compensation m...
- Patent number 11,206,084
- Issue date Dec 21, 2021
- Nippon Telegraph and Telephone Corporation
- Minoru Yamaguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Video encoding apparatus including movement compensation
- Patent number 4,837,632
- Issue date Jun 6, 1989
- Mitsubishi Denki Kabushiki Kaisha
- Tsutomu Kubo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Video encoding apparatus
- Patent number 4,769,826
- Issue date Sep 6, 1988
- Mitsubishi Denki Kabushiki Kaisha
- Tsutomu Kubo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OSNR SPECTRUM ESTIMATION APPARATUS, OSNR SPECTRUM ESTIMATION METHOD...
- Publication number 20210351842
- Publication date Nov 11, 2021
- Nippon Telegraph and Telephone Corporation
- Hiroki KAWAHARA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER, OPTICAL TRANSMISSION SYSTEM, AND OPTICAL CABLE F...
- Publication number 20210257803
- Publication date Aug 19, 2021
- Nippon Telegraph and Telephone Corporation
- Takashi Kotanigawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL TRANSMISSION SYSTEM AND FILTER PENALTY REDUCTION METHOD
- Publication number 20210234617
- Publication date Jul 29, 2021
- Nippon Telegraph and Telephone Corporation
- Kohei Saito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DISPERSION COMPENSATION DESIGNING DEVICE, DISPENSION COMPENSATION M...
- Publication number 20210159982
- Publication date May 27, 2021
- Nippon Telegraph and Telephone Corporation
- Minoru Yamaguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE