Seiji Hagiwara

Person

Yokosuka, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Measuring method and measuring device
- Patent number 11,356,862
- Issue date Jun 7, 2022
- NTT DoCoMo, Inc.
- Takayuki Furuta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wireless communication apparatus and wireless communication method
- Patent number 7,088,977
- Issue date Aug 8, 2006
- NTT DoCoMo, Inc.
- Ryuusuke Kaneda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission power control method, mobile phone, base station, and...
- Patent number 6,343,218
- Issue date Jan 29, 2002
- NTT DoCoMo Inc.
- Ryusuke Kaneda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Amplifier for radio transmission
- Patent number 6,265,935
- Issue date Jul 24, 2001
- NTT Mobile Communications Network Inc.
- Ryuusuke Kaneda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Antenna device having two resonance frequencies
- Patent number 5,917,450
- Issue date Jun 29, 1999
- NTT Mobile Communications Network Inc.
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Microstrip antenna device
- Patent number 5,767,810
- Issue date Jun 16, 1998
- NTT Mobile Communications Network Inc.
- Seiji Hagiwara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna equipment
- Patent number 5,617,105
- Issue date Apr 1, 1997
- NTT Mobile Communications Network, Inc.
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna devices having double-resonance characteristics
- Patent number 5,568,155
- Issue date Oct 22, 1996
- NTT Mobile Communications Network Incorporation
- Koichi Tsunekawa
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
MEASURING METHOD AND MEASURING DEVICE
- Publication number 20210227399
- Publication date Jul 22, 2021
- NTT DoCoMo, Inc.
- Takayuki Furuta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Wireless communication apparatus and wireless communication method
- Publication number 20020006775
- Publication date Jan 17, 2002
- NTT DoCoMo, Inc.
- Ryuusuke Kaneda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Seiji Hagiwara

Person

Patents Grantslast 30 patents

Measuring method and measuring device

Wireless communication apparatus and wireless communication method

Transmission power control method, mobile phone, base station, and...

Amplifier for radio transmission

Antenna device having two resonance frequencies

Microstrip antenna device

Antenna equipment

Antenna devices having double-resonance characteristics

Patents Applicationslast 30 patents

MEASURING METHOD AND MEASURING DEVICE

Wireless communication apparatus and wireless communication method