1
Minoru Kanoi, Yuzuru Imamura, Saburo Yasukawa, Masahiko Amano, Shinji Tanifuji, Toshifumi Yoshikawa, Masahiro Watanabe: Control system for power transmission and distribution system. Hitachi, Fay Sharpe Beall Fagan Minnich & McKee, June 2, 1998: US05760492 (33 worldwide citation)

In a control system for a power transmission and distribution system, a plurality of distributed power supplying and receiving units each including a control unit are provided and connected along a power distribution line. The power supplying and receiving unit function to generate active and reacti ...


2
Toshifumi Yoshikawa, Yasuo Satou: Power supply and power supply method upon interruption of electric service. Hitachi, Crowell & Moring, June 9, 2009: US07545053 (24 worldwide citation)

A power supply system includes a power line for supplying power from a distributed power source to a load upon interruption of electric service from a power system, the load being supplied with power from the power system at normal times; a first switch for connecting the load with the power system ...


3
Takahiro Takimoto, Isamu Ohkubo, Masaru Kubo, Hiroki Nakamura, Toshihiko Fukushima, Toshifumi Yoshikawa: Light receiving element, light detector with built-in circuitry and optical pickup. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, September 27, 2005: US06949809 (7 worldwide citation)

A light receiving element, comprising a semiconductor structure comprising at least a first conductivity type semiconductor layer, a first, second conductivity type semiconductor layer provided on the first conductivity type semiconductor layer in the semiconductor structure, a second, second conduc ...


4
Yoshio Katsuro, Hozumi Endo, Akira Utsunomiya, Hiroaki Nagai, Toshifumi Yoshikawa, Shoji Oishi, Takashi Yamaguchi: Process for producing synthetic quartz glass powder. Mitsubishi Chemical Corporation, Oblon Spivak McClelland Maier & Neustadt P C, August 29, 2000: US06110852 (5 worldwide citation)

A process for producing synthetic quartz powder which comprises calcining silica gel powder to produce a synthetic quartz glass powder, wherein dry air is used in the calcining process at least in the process of cooling from 800.degree. C. to 200.degree. C. This process enables efficient production ...


5
Toshifumi Yoshikawa, Satoru Toriyabe, Takamichi Hoshino, Shunichi Tanae, Atsuya Fujino, Ryou Okabe, Masaya Furuhashi, Kenji Yoneda: Method, system, and display for elevator allocation using multi-dimensional coordinates. Hitachi, Hitachi Mito Engineering, Crowell & Moring, July 21, 2009: US07562746 (4 worldwide citation)

A method and a display for elevator allocation evaluating are provided. When an elevator allocated to a hall call is selected by employing two different view points such as a real and a future call evaluation index, an elevator allocation reason and a balance between the two view points can be easil ...


6
Toshifumi Yoshikawa, Satoru Toriyabe, Takamichi Hoshino, Atsuya Fujino, Shunichi Tanae, Hiromi Inaba, Kenji Yoneda, Toru Yamaguchi, Ryo Okabe: Elevator group supervisory control system. Hitachi, Hitachi Mito Engineering, Crowell & Moring, September 23, 2008: US07426982 (4 worldwide citation)

An elevator group control system is provided which stably keeps cage's position in temporally equal interval condition over a long period of time. The present invention provides a system comprising: reference route generating means, which for each elevator, generates a reference route which the elev ...


7
Toshifumi Yoshikawa, Naoto Ohnuma, Toshisuke Mine, Takao Kishikawa, Sadao Hokari: Driving system for driving AC motor. Hitachi, Antonelli Terry Stout & Kraus, December 10, 2002: US06492790 (4 worldwide citation)

A driving system for driving an AC motor, which is capable of promptly switching to an individual inverter operation mode, wherein a control instruction for each of a plurality of power converters is generated by summing outputs of a plurality of current compensation units connected in parallel, and ...


8
Toshifumi Yoshikawa, Satoru Toriyabe, Takamichi Hoshino, Atsuya Fujino, Shunichi Tanae, Hiromi Inaba, Kenji Yoneda, Toru Yamaguchi, Ryo Okabe: Elevator group supervisory control system with route preparation section. Hitachi, Hitachi Mito Engineering, Crowell & Moring, June 22, 2010: US07740111 (1 worldwide citation)

An elevator group control system for controlling multiple elevators cars each of which serves a plurality of floors includes a route preparation section which, at a time of assigning a hall call to one of the elevator cars, calculates a future trajectory for each of the elevator cars. The future tra ...


9
Hirokazu Nagura, Hiromi Inaba, Toshifumi Yoshikawa, Hironori Ohashi, Yuri Takano, Masaki Sugiura: Control apparatus and method for linear synchronous motor. Hitachi, Crowell & Moring, February 15, 2011: US07888893 (1 worldwide citation)

The start timing of the pole position inference process of the linear motor installed vertically is delayed by a predetermined time after instruction of brake release. For example, from (1) increasing of the thrust instruction value of an ASR control system up to a predetermined value, (2) the movem ...


10
Toshifumi Yoshikawa, Satoru Toriyabe, Takamichi Hoshino, Atsuya Fujino, Shunichi Tanae, Hiromi Inaba, Kenji Yoneda, Toru Yamaguchi, Ryo Okabe: Elevator group supervisory control system using target route preparation. Hitachi, Hitachi Mito Engineering, Crowell & Moring, June 8, 2010: US07730999

An elevator group control system includes a reference route generating portion, which for each elevator, generates a reference route which the elevator should follow with respect to the time axis and position axis; and an assignment portion which selects an elevator for assignment to a generated hal ...