Patents by Inventor Yousuke Sakai

Yousuke Sakai 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: 20190214235
    Abstract: Provided is a plasma processing apparatus in which a sample as a processing target placed and held on a sample stage is processed using plasma formed inside a processing chamber, the sample stage being disposed inside the processing chamber inside a vacuum chamber, wherein a plate-like member, which is disposed on the sample stage, constitutes a top surface placed with the sample, and is formed of a first dielectric, includes: an outer circumferential protruding portion disposed in a ring shape surrounding a central portion on the top surface of the plate-like member along an outer circumferential edge; a plurality of columnar projections which are arranged on the top surface of the plate-like member on the central side of the outer circumferential protruding portion; and a film formed of a second dielectric which covers the top surface of the plate-like member on the central side of the outer circumferential protruding portion, a top-portion top surface of the projections, and a top surface of the plate-like
    Type: Application
    Filed: August 27, 2018
    Publication date: July 11, 2019
    Inventors: Kenetsu YOKOGAWA, Masakazu ISOZAKI, Yousuke SAKAI, Masahito MORI, Takao ARASE
  • Patent number: 5493087
    Abstract: A key switch operating unit having an elastic cylinder hermetically interposed between the top surface of a housing and the lower surface of a flange portion of a key stem, and a rubber bottom cover covering the lower opening of the housing so as to define an airtight inner space. The housing has an inner partition wall and an outer peripheral wall to define a dust protective space. Small foreign substances such as dust and liquid tending to enter into the inside of the housing when operating the key switch can be prevented from entering.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: February 20, 1996
    Assignee: SMK Co., Ltd.
    Inventors: Haruo Yoshida, Yousuke Sakai
  • Patent number: D870314
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: December 17, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Masakazu Isozaki, Masahito Mori, Kenetsu Yokogawa, Takao Arase, Yousuke Sakai