Patents by Inventor Tetsuro Yamaguchi
Tetsuro Yamaguchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11930309Abstract: A photonics-electronics convergence switch with which, even if an optical network system is built by combining a plurality of packet switches, the amount of processing in the packet switches does not increase, the optical network system operates with low electric power consumption, and this enables wide-range optical communication between the nodes of a communication origin and of a communication partner, includes a network processor that is an electronic circuit configured to control the functions of the packet switch, a plurality of optical transmitter-receivers having photoelectric conversion functions, and a plurality of optical switches.Type: GrantFiled: February 26, 2020Date of Patent: March 12, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Keita Yamaguchi, Osamu Moriwaki, Shunichi Soma, Kenya Suzuki, Seiki Kuwabara, Tetsuro Inui, Shuto Yamamoto, Seiji Okamoto, Hideki Nishizawa
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Patent number: 11923897Abstract: The present disclosure has an object of proposing a method and a device for estimating the state of a transmission path or an optical transmitter capable of mechanically estimating a factor causing an error with a small amount of constellation data and a low computing amount.Type: GrantFiled: December 11, 2019Date of Patent: March 5, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takayuki Nakachi, Yitu Wang, Tetsuro Inui, Takafumi Tanaka, Takahiro Yamaguchi, Katsuhiro Shimano
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Patent number: 6547344Abstract: A braking apparatus for vehicles BU, in which plurality systems of individually separated brake fluid pressure passages BC(A), BC(B) are arranged, and each passage is provided with at least one brake fluid pressure retaining means RU(A), RU(B) for continuously retaining brake fluid pressure within a wheel cylinder WC(A), WC(B) arranged in the brake fluid pressure passage after a depression of a brake pedal BP is released and for releasing the retained brake fluid pressure in response to an increase of a starting driving force of the vehicle, wherein the release of the retained brake fluid pressure is carried out in a time differential manner at each brake fluid pressure retaining means.Type: GrantFiled: June 13, 2001Date of Patent: April 15, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Satoshi Hada, Keisuke Katsuta, Hirohiko Totsuka, Shohei Matsuda, Tetsuro Yamaguchi, Kazuaki Fukami
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Patent number: 6415897Abstract: A brake fluid pressure retaining unit for retaining brake fluid pressure within a wheel cylinder after releasing a brake pedal is disclosed. The brake fluid pressure retaining unit includes a brake fluid pressure reduction speed control device for retaining reduction speed of the brake fluid pressure within the wheel cylinder less than that of brake pedal load applied by a driver. The brake fluid pressure reduction speed control device may be formed by a restriction in a brake fluid pressure circuit arranged between a master cylinder at which the brake fluid pressure is generated in accordance with a brake pedal load applied by the driver and the wheel.Type: GrantFiled: December 9, 1999Date of Patent: July 9, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yoichi Sugimoto, Shohei Matsuda, Shouji Suzuki, Takahiro Eguchi, Tetsuro Yamaguchi, Masaru Sasaguchi, Kazuaki Fukami
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Publication number: 20020021045Abstract: A braking apparatus for vehicles BU, in which plurality systems of individually separated brake fluid pressure passages BC(A), BC(B) are arranged, and each passage is provided with at least one brake fluid pressure retaining means RU(A), RU(B) for continuously retaining brake fluid pressure within a wheel cylinder WC(A), WC(B) arranged in the brake fluid pressure passage after a depression of a brake pedal BP is released and for releasing the retained brake fluid pressure in response to an increase of a starting driving force of the vehicle, wherein the release of the retained brake fluid pressure is carried out in a time differential manner at each brake fluid pressure retaining means.Type: ApplicationFiled: June 13, 2001Publication date: February 21, 2002Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Satoshi Hada, Keisuke Katsuta, Hirohiko Totsuka, Shohei Matsuda, Tetsuro Yamaguchi, Kazuaki Fukami
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Patent number: 5252549Abstract: The present invention is related to a superconductive ceramic wire and a method for making same. According to the first aspect of the invention, there is provided a method for making a superconductive ceramic wire, the method comprising the steps of: (a) preparing a superconductive porous ceramics; (b) depositing lead in the pores of the ceramics; (c) covering the lead-depositted ceramics with a metal; and (d) extending the metal-clad and lead-deposited ceramics. According to the second aspect of the invention, there is provided a superconductive ceramic wire which is obtained by: (a) preparing a superconductive porous ceramics; (b) depositing lead in the pores of the ceramics; (c) covering the lead-depositted ceramics with a metal; and (d) extending the metal-clad lead-depositted ceramics.Type: GrantFiled: July 22, 1991Date of Patent: October 12, 1993Assignee: Mitsubishi Kinzoku Kabushiki KaishaInventors: Tetsuro Yamaguchi, Takuo Takeshita, Sadaaki Hagino
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Patent number: 5110789Abstract: The present invention is related to a superconductive ceramic wire and a method for making same.According to the first aspect of the invention, there is provided a method for making a superconductive ceramic wire, the method comprising the steps of: (a) preparing a superconductive porous ceramics; (b) depositing lead in the pores of the ceramics; (c) covering the lead-deposited ceramics with a metal; and (d) extending the metal-clad and lead-deposited ceramics.According to the second aspect of the invention, there is provided a superconductive ceramic wire which is obtained by: (a) preparing a superconductive porous ceramics; (b) depositing lead in the pores of the ceramics; (c) covering the lead-deposited ceramics with a metal; and (d) extending the metal-clad lead-deposited ceramics.Type: GrantFiled: July 25, 1990Date of Patent: May 5, 1992Assignee: Mitsubishi Materials CorporationInventors: Tetsuro Yamaguchi, Takuo Takeshita, Sadaaki Hagino
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Patent number: 4881614Abstract: A motorcycle exhaust pipe arrangement includes a frame having a head pipe, a main pipe, a down tube, at least one under pipe and a pair of center pipes. A fuel tank is operatively connected to the main pipe. An engine is mounted on the at least one under pipe and is disposed beneath the fuel tank. A seat is mounted adjacent said fuel tank and is disposed above the engine. A rear shock absorber is operatively mounted between the seat and the at least one under pipe for absorbing shock supplied to the seat. The rear shock absorber is centrally disposed relative to a longitudinal axis of the motorcycle. An exhaust pipe is connected to the engine and extends rearwardly therefrom, the exhaust pipe is disposed substantially at a midpoint of the rear shock absorber and extends substantially horizontally therefrom in the longitudinal direction of the motorcycle for lowering the center of gravity of the motorcycle and providing a symmetrical rigid frame for supporting the engine, fuel tank and seat.Type: GrantFiled: February 16, 1988Date of Patent: November 21, 1989Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Norio Hoshi, Tetsuro Yamaguchi, Yasuhiro Okada, Takao Matsukawa