Patents by Inventor Yuichiro Suenaga

Yuichiro Suenaga 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).

  • Patent number: 11967750
    Abstract: A low-cost, small-size Wilkinson-type combiner that suppresses the risk of damaging an isolation resistor due to combination loss is provided. The combiner comprises first and second input terminals to which RF signals are input; an output terminal; a wiring line that combines the RF signals input to the first and second input terminals, and outputs the combined signal to the output terminal; an isolation unit provided between the first and second input terminals and formed by a first isolation resistor, a transformer, and a second isolation resistor connected in series; a detection circuit connected to a secondary coil of the transformer and configured to detect a current flowing in the secondary coil; and a determination circuit that outputs a control signal to block input of RF signals to the first and second input terminals if the current flowing in the isolation unit and detected by the detection circuit is higher than or equal to a prescribed value.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: April 23, 2024
    Assignee: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Sunao Egashira, Kenji Nasu, Yuichiro Suenaga, Naoya Fujimoto
  • Publication number: 20220045417
    Abstract: A low-cost, small-size Wilkinson-type combiner that suppresses the risk of damaging an isolation resistor due to combination loss is provided. The combiner comprises first and second input terminals to which RF signals are input; an output terminal; a wiring line that combines the RF signals input to the first and second input terminals, and outputs the combined signal to the output terminal; an isolation unit provided between the first and second input terminals and formed by a first isolation resistor, a transformer, and a second isolation resistor connected in series; a detection circuit connected to a secondary coil of the transformer and configured to detect a current flowing in the secondary coil; and a determination circuit that outputs a control signal to block input of RF signals to the first and second input terminals if the current flowing in the isolation unit and detected by the detection circuit is higher than or equal to a prescribed value.
    Type: Application
    Filed: February 6, 2020
    Publication date: February 10, 2022
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Sunao EGASHIRA, Kenji NASU, Yuichiro SUENAGA, Naoya FUJIMOTO
  • Patent number: 10522120
    Abstract: A key unit includes: a base portion that is fixable to a musical instrument body that includes a tube body; a key post that projects from the base portion; a key shaft that is attached to the key post; and a key that is attached to the key shaft.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: December 31, 2019
    Assignee: YAMAHA CORPORATION
    Inventor: Yuichiro Suenaga
  • Patent number: 10354624
    Abstract: A wind instrument includes a tube body; a tone hole tube that has an inner open end formed extending from the outer periphery of the tube body and opening to the inside of the tube body, and an outer open end opening to the outside of the tube body; and a finger pressing plate that, in the radial direction of the tone hole tube, extends from the outer open end of the tone hole tube to the outside of the tone hole tube.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: July 16, 2019
    Assignee: YAMAHA CORPORATION
    Inventors: Yuichiro Suenaga, Toru Ohno
  • Patent number: 10199018
    Abstract: A mute is provided that can be stored together with a wind instrument. A mute comprises a main body portion, a rod-like member, and an inner head. The main body portion comprises a body, a head, and a connecting member. When in use, a large diameter end of the body is connected to a large diameter end of the head. When the inner head is in a bell, the body is fixed to the inner circumferential face of the bell. For storage, the mute is reassembled into a mode for storage in which the body is separated from the head, the head is in the head, and the inner head is in the head. The entire mute reassembled into this mode is in the bell.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: February 5, 2019
    Assignee: Yamaha Corporation
    Inventor: Yuichiro Suenaga
  • Patent number: 10199017
    Abstract: A wind instrument includes: a tube body; and a plurality of tone hole tubes each having an outer open end formed at the outer periphery of the tube body and an inner open end formed through the outer opening end and opening to the inside of the tube body, wherein at least one of the tube body and the tone hole tube is curved such that the plurality of outer open ends of the plurality of tone hole tubes are disposed so as to be in positions corresponding to respective fingers of the performer, and the plurality of inner open ends are connected at positions that cause the tube body to produce a predetermined pitch.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: February 5, 2019
    Assignee: YAMAHA CORPORATION
    Inventor: Yuichiro Suenaga
  • Publication number: 20180374458
    Abstract: A key unit includes: a base portion that is fixable to a musical instrument body that includes a tube body; a key post that projects from the base portion; a key shaft that is attached to the key post; and a key that is attached to the key shaft.
    Type: Application
    Filed: August 30, 2018
    Publication date: December 27, 2018
    Inventor: Yuichiro SUENAGA
  • Publication number: 20180254026
    Abstract: A wind instrument includes: a tube body; and a plurality of tone hole tubes each having an outer open end formed at the outer periphery of the tube body and an inner open end formed through the outer opening end and opening to the inside of the tube body, wherein at least one of the tube body and the tone hole tube is curved such that the plurality of outer open ends of the plurality of tone hole tubes are disposed so as to be in positions corresponding to respective fingers of the performer, and the plurality of inner open ends are connected at positions that cause the tube body to produce a predetermined pitch.
    Type: Application
    Filed: September 20, 2016
    Publication date: September 6, 2018
    Inventor: Yuichiro SUENAGA
  • Publication number: 20180190245
    Abstract: A wind instrument includes a tube body; a tone hole tube that has an inner open end formed extending from the outer periphery of the tube body and opening to the inside of the tube body, and an outer open end opening to the outside of the tube body; and a finger pressing plate that, in the radial direction of the tone hole tube, extends from the outer open end of the tone hole tube to the outside of the tone hole tube.
    Type: Application
    Filed: September 13, 2016
    Publication date: July 5, 2018
    Inventors: Yuichiro SUENAGA, Toru OHNO
  • Publication number: 20180190247
    Abstract: A mute is provided that can be stored together with a wind instrument. A mute comprises a main body portion, a rod-like member, and an inner head. The main body portion comprises a body, a head, and a connecting member. When in use, a large diameter end of the body is connected to a large diameter end of the head. When the inner head is in a bell, the body is fixed to the inner circumferential face of the bell. For storage, the mute is reassembled into a mode for storage in which the body is separated from the head, the head is in the head, and the inner head is in the head. The entire mute reassembled into this mode is in the bell.
    Type: Application
    Filed: March 1, 2018
    Publication date: July 5, 2018
    Inventor: Yuichiro SUENAGA
  • Patent number: 9583079
    Abstract: A silencer for a wind instrument includes a hollow pipe whose one end is closed and serves as a closed end. The pipe includes an outer wall having at least one of at least one recessed portion and at least one protruding portion on a portion of the outer wall near the closed end.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: February 28, 2017
    Assignee: Yamaha Corporation
    Inventors: Yuichiro Suenaga, Keizo Tatsumi
  • Patent number: 9532134
    Abstract: A sound pickup apparatus, which can control directionality and has a simple structure, and in which a plurality of microphones can be provided so as to be floated by using the small number of parts, is provided. Three support columns 13A to 13C having the same length are provided upright on a top surface of a housing 11 of a sound pickup apparatus 1. The support columns 13A to 13C are equidistantly arranged away from a center position of the housing 11 and equally spaced 120 degrees apart from each other. A frame 4 having microphone frames 14A to 14C in which microphones are fitted is arranged above the top surface of the housing 11. In addition, the microphone frames 14A to 14C are coupled to the support columns 13A to 13C of the housing 11 by elastic rubbers 15A to 15C in a state where tensile stress passes the center of the housing 11 and is generated in an outward direction.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: December 27, 2016
    Assignee: YAMAHA CORPORATION
    Inventors: Seiichiro Hosoe, Yuichiro Suenaga, Satoshi Ukai, Ryo Oouchi
  • Patent number: 9294833
    Abstract: The invention provides a sound collection device having little error in a desired directivity. The sound collection device includes a unidirectional microphone 12A, a unidirectional microphone 12B, and a unidirectional microphone 12C which are arranged on one plane. Each of the unidirectional microphones has the maximum sensitivity direction directed toward the inside of the arrangement. Each of the unidirectional microphones has a rear surface (direction of the minimum sensitivity) being open acoustically. Since the maximum sensitivity direction of each of the unidirectional microphones is directed toward the inside of the arrangement, the oscillation plane of each of the unidirectional microphones can be positioned substantially at the center of the arrangement. Thus, by adjusting the gain of the sound collected by the respective unidirectional microphones, the directivity can be freely formed on a flat plane with little error.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: March 22, 2016
    Assignee: YAMAHA CORPORATION
    Inventors: Ryo Oouchi, Yuichiro Suenaga, Satoshi Ukai, Seiichiro Hosoe
  • Patent number: 9240174
    Abstract: An electric stringed musical instrument includes: a string which vibrates by a performance operation; a body which supports the string via a bridge; a pickup sensor mounted on a portion which vibrates by a vibration of the string, the pickup sensor being configured to detect a vibration having propagated from the string and output an electric signal; a supporter having a spring structure which supports the bridge with respect to the body; and a damper mounted on a portion which vibrates by a vibration of the string, the damper being configured to damp a vibration of the bridge.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: January 19, 2016
    Assignee: Yamaha Corporation
    Inventors: Yuichiro Suenaga, Shinya Tamura, Masao Noro
  • Patent number: 9142198
    Abstract: A silencer includes: a hollow main body to be inserted in a bell of a wind instrument and including (a) a rear end portion serving as an opening portion and (b) a front end portion serving as a closing portion; and a flow-path adjuster supported by the main body in the bell and configured to narrow a path through which a breath of a player of the wind instrument is delivered into the main body. The front end portion of the main body is located near a frontmost portion of the bell or at a rear of the frontmost portion in a state in which the main body in mounted in the bell.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: September 22, 2015
    Assignee: Yamaha Corporation
    Inventor: Yuichiro Suenaga
  • Patent number: 9117430
    Abstract: An electric stringed musical instrument including: a string which vibrates by a performance operation; a body which supports the string via a bridge; a pickup sensor mounted on a portion which vibrates by a vibration of the string, the pickup sensor being configured to detect a vibration having propagated from the string and output an electric signal; and a supporter having a spring structure which supports the bridge with respect to the body to bring a vibration characteristic of the electric stringed musical instrument closer to a vibration characteristic of one acoustic stringed musical instrument.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: August 25, 2015
    Assignee: Yamaha Corporation
    Inventors: Yuichiro Suenaga, Shinya Tamura
  • Patent number: 9024160
    Abstract: A silencer includes: a main body including (a) a cylindrical portion whose outer circumferential surface is mounted on an inner circumferential surface of a bell of a wind instrument and (b) a closing portion configured to close one end portion of opposite end portions of the cylindrical portion; and a pipe including (i) a first end portion opening inside the main body and (b) a second end portion opening outside the main body. The first end portion of the pipe is disposed at a vicinity of the closing portion. The pipe is bent between the first end portion and the second end portion.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: May 5, 2015
    Assignee: Yamaha Corporation
    Inventor: Yuichiro Suenaga
  • Patent number: D929494
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: August 31, 2021
    Assignee: YAMAHA CORPORATION
    Inventors: Keizo Tatsumi, Yuichiro Suenaga
  • Patent number: D929495
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: August 31, 2021
    Assignee: YAMAHA CORPORATION
    Inventors: Keizo Tatsumi, Yuichiro Suenaga
  • Patent number: D1030854
    Type: Grant
    Filed: April 28, 2022
    Date of Patent: June 11, 2024
    Assignee: YAMAHA CORPORATION
    Inventors: Hiroki Nishioka, Yuichiro Suenaga