Patents by Inventor Shigeharu Murayama

Shigeharu Murayama 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).

  • Electro-Acoustic Converters, Electronic Devices, Waterproof Covers, and Air Leakage Test Methods For Electro-Acoustic Converters
    Publication number: 20150172797
    Abstract: It is an object to provide an electro-acoustic converter which can be subjected to air leakage test allowing a gas to pass through a waterproof film in such a condition that the waterproof film is attached to the electro-acoustic converter. An electro-acoustic converter is produced, which includes: a casing having a sound hole; and a diaphragm provided in the casing, wherein the sound hole is covered with the waterproof film to form a closed space, and the closed space is in communication with the outside of the casing through a vent for air leakage test.
    Type: Application
    Filed: November 24, 2014
    Publication date: June 18, 2015
    Inventor: Shigeharu Murayama
  • Electro-acoustic converters, electronic devices, waterproof covers, and air leakage test methods for electro-acoustic converters
    Patent number: 8942401
    Abstract: It is an object to provide an electro-acoustic converter which can be subjected to air leakage test allowing a gas to pass through a waterproof film in such a condition that the waterproof film is attached to the electro-acoustic converter. An electro-acoustic converter is produced, which includes: a casing having a sound hole; and a diaphragm provided in the casing, wherein the sound hole is covered with the waterproof film to form a closed space, and the closed space is in communication with the outside of the casing through a vent for air leakage test.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: January 27, 2015
    Assignee: W. L. Gore & Associates, Co., Ltd.
    Inventor: Shigeharu Murayama
  • Electro-Acoustic Converters, Electronic Devices, Waterproof Covers, and Air Leakage Test Methods for Electro-Acoustic Converters
    Publication number: 20110261986
    Abstract: It is an object to provide an electro-acoustic converter which can be subjected to air leakage test allowing a gas to pass through a waterproof film in such a condition that the waterproof film is attached to the electro-acoustic converter. An electro-acoustic converter is produced, which includes: a casing having a sound hole; and a diaphragm provided in the casing, wherein the sound hole is covered with the waterproof film to form a closed space, and the closed space is in communication with the outside of the casing through a vent for air leakage test.
    Type: Application
    Filed: July 31, 2008
    Publication date: October 27, 2011
    Inventor: Shigeharu Murayama