1
Kazuo Ohta, Tatsuaki Okamoto: Method and apparatus for implementing electronic cash. Nippon Telegraph and Telephone Corporation, Pollock Vande Sande & Priddy, December 11, 1990: US04977595 (246 worldwide citation)

In an electronic cash implementing method, a user makes a bank apply a blind signature to user information Vi produced, by a one-way function, from secret information Si containing identification information, thereby obtaining signed user information. Further, the user makes the bank apply a blind s ...


2
Takatoshi Sugiyama, Shuji Kubota, Masahiro Morikura, Kiyoshi Enomoto, Shuzo Kato: Digital communication system using superposed transmission of high speed and low speed digital signals. Nippon Telegraph and Telephone Corporation, Allegretti & Witcoff, January 18, 1994: US05280537 (220 worldwide citation)

A digital communication system using superposed transmission of high and low speed digital signals capable of transmitting superposed high and low speed digital signals through an identical frequency band efficiently by increasing a simultaneously transmittable number of channels in the low speed di ...


3
Gen Suzuki, Shohei Sugawara, Hiroya Tanigawa, Machio Moriuchi, Yoshio Nagashima, Yasuhiro Nakajima, Hiroyuki Arita, Yumi Murakami: Virtual space apparatus with avatars and speech. Nippon Telegraph and Telephone Corporation, Pollock Vande Sande & Priddy, April 7, 1998: US05736982 (208 worldwide citation)

A plurality of terminals are connected to a server via a communication network and share a predetermined common virtual space. The terminals each send to the server the position coordinates of the viewing point and direction of eyes of its user in the virtual space, and the visual field image viewed ...


4
Hiroki Machihara, Gengo Suzuki, Eiji Okada, Naoya Kanou: Method and system for information retrieval. Nippon Telegraph and Telephone Corporation, Pennie & Edmonds, May 15, 2001: US06233578 (192 worldwide citation)

The method and system for retrieving information allow the user to retrieve desired information from database systems by simply specifying retrieval content and retrieval conditions using languages familiar to the user, without having to know the names for the relevant database systems or their stru ...


5
Masanobu Abe, Yuki Yoshida: Reconstruction of wideband speech from narrowband speech using codebooks. Nippon Telegraph and Telephone Corporation, Pollock Vande Sande & Priddy, December 3, 1996: US05581652 (190 worldwide citation)

A wideband speech signal (8 kHz, for example) of high quantity is reconstructed from a narrowband speech signal (300 Hz to 3.4 kHz). The input narrowband speech signal is LPC-analyzed to obtain spectrum information parameters, and the parameters are vector-quantized using a narrowband speech signal ...


6
Shigeki Yamada, Katsumi Maruyama, Minoru Kubota, Satoshi Tanaka: Message passing system for distributed shared memory multiprocessor system and message passing method using the same. Nippon Telegraph and Telephone Corporation, Pollock Vande Sande & Priddy, April 1, 1997: US05617537 (189 worldwide citation)

In a multiprocessor system, each processor module comprises a processor, a distributed shared memory, a distributed memory coupler for controlling copying between distributed shared memories and a distributed memory protector for protecting said distributed shared memory against illegal access. The ...


7
Hideaki Nakazato, Hirofumi Hayama, Manabu Kishita, Masaki Nakao: Air conditioning method in machine room having forced air-cooling equipment housed therein. NIT Power and Building Facilities, Nippon Telegraph and Telephone Corporation, John P White, February 17, 1998: US05718628 (187 worldwide citation)

The cooling air generated from an air conditioner is supplied into an air passageway formed below the floor on which an equipment is disposed. The cooling air supplied to the air passageway is guided into the equipment through an opening made in the floor. The cooling air introduced into the equipme ...


8
Takao Nakamura, Hiroshi Ogawa, Yoichi Takashima: Method for embedding and reading watermark-information in digital form, and apparatus thereof. Nippon Telegraph and Telephone Corporation, Pennie & Edmonds, February 6, 2001: US06185312 (182 worldwide citation)

An apparatus for embedding information comprises: a blocking step for dividing data to be processed into blocks; an orthogonal transform step for obtaining coefficients by carrying out orthogonal transformation for each block; an embedding coefficient selecting step for determining coefficients in w ...


9
Koichi Tsunekawa, Atsuya Ando: Retractable antenna system. Nippon Telegraph and Telephone Corporation, Nikaido Marmelstein Murray & Oram, December 20, 1994: US05374937 (178 worldwide citation)

An antenna element (1) has a linear antenna rod (1b) of predetermined length and a top load (1a) at the end of the rod (1b). The antenna element (1) takes a first position in which the rod is extended out of a housing (8), and a second position in which the rod is retracted within the housing. There ...


10
Hiroyuki Kittaka, Osamu Akashi, Hideaki Suzuki, Terunao Soneoka, Naoyuki Satoh: On-line information providing scheme featuring function to dynamically account for users interest. Nippon Telegraph and Telephone Corporation, Jones & Askew, December 7, 1999: US05999975 (176 worldwide citation)

An on-line information providing scheme capable of dynamically accounting for user's interest with respect to information and providing appropriate information presentation according to the user's interest. An information provider device updates the information attribute value of the specified infor ...