1
Kouji Chiba, Toshio Nojima, Yasushi Yamao, Shigeru Tomisato, Tadao Takami: Linear transmitter. Nippon Telegraph & Telephone Corporation, Cushman Darby & Cushman, October 5, 1993: US05251330 (73 worldwide citation)

This invention relates to a linear transmitter which controls the bias voltage of either the drain electrode or collector electrode of an amplifier for radio frequency based on the envelope of the modulated signal, and is characterized in that it controls the bias voltage of the radio frequency ampl ...


2
Ryuusuke Kaneda, Seiji Hagiwara, Tadao Takami: Amplifier for radio transmission. NTT Mobile Communications Network, Connolly Bove Lodge & Hutz, July 24, 2001: US06265935 (31 worldwide citation)

In a radio transmission amplifier unit which has between input and output terminals a gain-controlled amplifier


3
Ichiro Okajima, Akihiro Maebara, Atsushi Murase, Katsumi Kobayashi, Tadao Takami: Method and apparatus of a mobile communication system which reduces power consumption by observing only the starting slot on a TDMA radio channel. NTT Docomo, Brinks Hofer Gilson & Lione, November 16, 2004: US06819661 (29 worldwide citation)

Base station generates a mobile station identifier which indicates a mobile station that a data signal is addressed thereto, and a head slot having a data signal when there is a data signal that has a length to be able to transmitted using one slot of a TDMA radio channel. When there is a data signa ...


4
Tomoaki Hirayama, Tadao Takami, Kiyohito Nagata: Radio communication system, frequency allocation method and frequency allocation device. NTT Docomo, Brinks Hofer Gilson & Lione, December 2, 2003: US06658257 (12 worldwide citation)

Among cellular radio communication systems, there are those in which a plurality of businesses, e.g. businesses A, B and C share a designated frequency band, and each business provides radio communication services using respectively allotted frequency bands. In this type of radio communication syste ...


5
Keiichi Ikawa, Tetsuaki Nakanishi, Kazuhisa Tsubaki, Kazuhiro Umetsu, Tadao Takami: Data receiving apparatus. Matsushita Communication Industrial, NTT Mobile Communications Network, Allen Wood, Catherine A Ferguson, Venable, September 28, 1999: US05960336 (6 worldwide citation)

A data receiving apparatus is constructed to make comparison of received signal strength of a plurality of receiving antennas by making use of timing of a sync word, which is not necessary for making synchronization acquisition, among a plurality of sync words contained in a subframe of a receiving ...


6
Tomoaki Hirayama, Tadao Takami, Kiyohito Nagata: Radio communication system, frequency allocation method and frequency allocation device. NTT Mobile Communications Networks, Brinks Hofer Gilson & Lione, July 25, 2006: US07082310 (5 worldwide citation)

Among cellular radio communication systems, there are those in which a plurality of businesses, e.g. businesses A, B and C share a designated frequency band, and each business provides radio communication services using respectively allotted frequency bands. In this type of radio communication syste ...


7
Chie Noda, Hiroyuki Hattori, Tadao Takami, Ichiro Okajima: Mobile communication device, mobile data communication method, and recording medium. NTT Docomo, Brinks Hofer Gilson & Lione, January 14, 2003: US06507566 (4 worldwide citation)

In a mobile communication system, the PAD of the data-processing-terminal-interface has a packet assembling/disassembling function for the protocol for data-link layer A and the protocol for data-link layer B. The protocol for data-link layer A of the data processing terminal prescribes that a frame ...


8
Hisashi Nakagomi, Tadao Takami: Mobile communication terminal device and server device. NTT Docomo, Oblon Spivak McClelland Maier & Neustadt L, December 29, 2009: US07639816 (3 worldwide citation)

The mobile communication terminal device has a security communication function, and includes a detection unit for detecting the security level of the destination of connection, and an announcing unit for announcing the detected security level. The user is able to confirm whether security is ensured ...


9
Hisashi Nakagomi, Tadao Takami, Akihiro Higashi, Kiyohito Nagata: Signal strength measurement method and device. NTT Communications Networks, Brinks Hofer Gilson & Lione, April 29, 2003: US06556552 (2 worldwide citation)

In CDMA mobile communication systems, there are cases in which communications are interrupted with the local base station while the mobile station is searching for channels other than the communication channel. A method is offered of preventing loss of information due to interruptions in such a case ...


10
Motoyuki Uchida, Tadao Takami, Yasutaka Urakawa, Takashi Kadohiro, Hiroaki Tomoda, Seiji Hoshi, Makoto Ito: Mobile communication terminal, information processing method, data processing program, and recording medium. NTT Docomo, Oblon Spivak McClelland Maier & Neustadt L, March 16, 2010: US07681030 (1 worldwide citation)

A transmitter cell phone 10 is provided with a controller 11 for fulfilling functions of a data encryptor, a first key encryptor, and an encryption file generator. The data encryptor encrypts data, using a first encryption key. The first key encryptor encrypts the first encryption key, using a secon ...