Patents by Inventor Hiromichi Ozawa

Hiromichi Ozawa 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).

  • Publication number: 20210136477
    Abstract: Provided is a wireless earphone capable of suppressing an influence on the sound quality of an electroacoustic transducer due to the arrangement of electrical parts such as a battery and a circuit board while reducing the size of a casing. The wireless earphone includes an electroacoustic transducer 14 that outputs a sound wave corresponding to a sound signal from a sound source S, a reception circuit 151 that receives the sound signal from the sound source S via a wireless communication line, a circuit board 15 to which the reception circuit 151 is attached, and a casing 11 that accommodates the circuit board 15 and the electroacoustic transducer 14. The casing 11 includes a first casing 11A that accommodates the electroacoustic transducer 14, and a second casing 11B that accommodates the circuit board 15.
    Type: Application
    Filed: July 13, 2018
    Publication date: May 6, 2021
    Inventor: Hiromichi OZAWA
  • Publication number: 20200196060
    Abstract: An acoustic diaphragm 1 according to the present invention includes a center dome member, and a sub dome member. The center dome member includes a center dome 2 and an annular first plane part 2a that is disposed along the outer periphery of the center dome and formed integrally with the center dome. The sub dome member includes a sub dome 3 and an annular second plane part 3a that is disposed along the inner periphery of the sub dome and formed integrally with the sub dome. The first plane part includes a rising part 2b of the center dome, a first front surface, and a first back surface. The second plane part includes an inner peripheral edge 3b, a second front surface, and a second back surface. The center dome is formed of a material different from that of the sub dome. The sub dome surrounds the periphery of the center dome. The inner peripheral edge coincides with the rising part. The first front surface is joined to the second back surface.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 18, 2020
    Inventor: Hiromichi OZAWA
  • Patent number: 10687133
    Abstract: A headphone is provided that includes a driver unit securely fixed to the baffle plate with a simple structure and has desirable frequency characteristics in a high frequency range and a low frequency range. A headphone includes a baffle plate, a driver unit fixed to the baffle plate, and a fixing member fixing the driver unit to the baffle plate. The fixing member includes a contact part having a shape of a plate in contact with the outer edge of the driver unit.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: June 16, 2020
    Assignee: AUDIO-TECHNICA CORPORATION
    Inventor: Hiromichi Ozawa
  • Publication number: 20190191251
    Abstract: A diaphragm and an electroacoustic transducer that suppress the influence to the lowest resonant frequency and enhance the mechanical strength includes a main dome, an auxiliary dome extending from an outer peripheral edge of the main dome, and a reinforcing member disposed on a boundary between the main dome and the auxiliary dome. The reinforcing member is disposed so as not to reach an outer peripheral edge of the auxiliary dome.
    Type: Application
    Filed: October 15, 2018
    Publication date: June 20, 2019
    Inventor: Hiromichi OZAWA
  • Patent number: 10028048
    Abstract: A headphone includes a baffle plate, a driver unit attached to the baffle plate, a housing forming a back cavity at a front side of the baffle plate and the driver unit, and an ear pad attached to a peripheral edge portion of the baffle plate at a front side and forming the front cavity at the front side of the baffle plate, and the baffle plate includes at least one through hole that allows the back cavity and the front cavity to acoustically communicate with each other. The sound wave emitted from the driver unit to the back cavity passes through the through hole and cancels a low-frequency range sound wave of a sound wave emitted from the driver unit to the front cavity, so that sound quality in a low-frequency range is improved.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: July 17, 2018
    Assignee: AUDIO-TECHNICA CORPORATION
    Inventor: Hiromichi Ozawa
  • Publication number: 20180103309
    Abstract: A headphone is provided that includes a driver unit securely fixed to the baffle plate with a simple structure and has desirable frequency characteristics in a high frequency range and a low frequency range. A headphone includes a baffle plate, a driver unit fixed to the baffle plate, and a fixing member fixing the driver unit to the baffle plate. The fixing member includes a contact part having a shape of a plate in contact with the outer edge of the driver unit.
    Type: Application
    Filed: June 29, 2017
    Publication date: April 12, 2018
    Inventor: Hiromichi OZAWA
  • Publication number: 20170257690
    Abstract: A headphone includes a baffle plate, a driver unit attached to the baffle plate, a housing forming a back cavity at a front side of the baffle plate and the driver unit, and an ear pad attached to a peripheral edge portion of the baffle plate at a front side and forming the front cavity at the front side of the baffle plate, and the baffle plate includes at least one through hole that allows the back cavity and the front cavity to acoustically communicate with each other. The sound wave emitted from the driver unit to the back cavity passes through the through hole and cancels a low-frequency range sound wave of a sound wave emitted from the driver unit to the front cavity, so that sound quality in a low-frequency range is improved.
    Type: Application
    Filed: February 9, 2017
    Publication date: September 7, 2017
    Inventor: Hiromichi OZAWA
  • Patent number: 8712087
    Abstract: The earphone includes a driver unit; a housing accommodating the driver unit, the housing having a front face serving as a sound emitting surface and a bowl shaped rear face; a hollow casing provided separately from the housing, the casing being configured to increase an internal volume adjacent to the rear side of a vibrating plate and to reduce the back pressure of the vibrating plate; and a connecting channel connecting the rear face of the housing and the casing such that the housing is in communication with the internal space of the casing, in which the housing includes a sound emitting tube protruding from the front face thereof so as to be fitted into an external auditory meatus.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: April 29, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiromichi Ozawa
  • Publication number: 20120076341
    Abstract: The earphone includes a driver unit; a housing accommodating the driver unit, the housing having a front face serving as a sound emitting surface and a bowl shaped rear face; a hollow casing provided separately from the housing, the casing being configured to increase an internal volume adjacent to the rear side of a vibrating plate and to reduce the back pressure of the vibrating plate; and a connecting channel connecting the rear face of the housing and the casing such that the housing is in communication with the internal space of the casing, in which the housing includes a sound emitting tube protruding from the front face thereof so as to be fitted into an external auditory meatus.
    Type: Application
    Filed: May 17, 2010
    Publication date: March 29, 2012
    Inventor: Hiromichi Ozawa
  • Patent number: D639283
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: June 7, 2011
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Hiromichi Ozawa, Wataru Sakuma
  • Patent number: D784298
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: April 18, 2017
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventors: Hiromichi Ozawa, Shohei Araki
  • Patent number: D813847
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: March 27, 2018
    Assignee: KABUSHIKI KAISHA AUDIO-TECHNICA
    Inventors: Hiromichi Ozawa, Shohei Araki
  • Patent number: D873237
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: January 21, 2020
    Assignee: Audio-Technica Corporation
    Inventors: Hiromichi Ozawa, Yosuke Takubo, Shohei Araki
  • Patent number: D920292
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: May 25, 2021
    Assignee: Audio-Technica Corporation
    Inventors: Hiromichi Ozawa, Yutaro Kumagai