Patents by Inventor Michel Ratajski

Michel Ratajski 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: 4497584
    Abstract: A case body is fixed to a glass by means of an interposed ring of a vulcanizable elastomer, this ring being bonded by vulcanization either directly to the glass or to a metallized coating applied to the glass, as well as to the upper surface of the case body. The metallic coating is applied to an annular zone at the periphery of the underside of the glass. Instead of this coating, the inside surface of the glass may be frosted in that zone.
    Type: Grant
    Filed: June 7, 1983
    Date of Patent: February 5, 1985
    Assignee: Firma H. Finger
    Inventor: Michel Ratajski
  • Patent number: 3978710
    Abstract: An apparatus for testing the gas impermeability of watch cases or other small articles comprises two enclosures. A bellows forms part of a hermetic separation between the enclosures, the bellows serving to move the movable plate of a variable condenser. The condenser is connected in an oscillator circuit to vary the oscillator frequency in accordance with the differential pressures between the two enclosures. The oscillator output frequency is compared with the output frequency of a stable frequency generator to provide a measurement indication. A watch case is placed within one enclosure and both enclosures brought to equal pressures after which the measurement of gas impermeability may begin.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: September 7, 1976
    Assignee: OMEGA Louis Brandt & Frere S.A.
    Inventor: Michel Ratajski
  • Patent number: D565433
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: April 1, 2008
    Assignee: Namiki Seimitsu Houseki Kabushiki Kaisha
    Inventors: Michel Ratajski, Susumu Shibata, Hajime Sasaki, Yoichi Yaguci
  • Patent number: D565970
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: April 8, 2008
    Assignee: Namiki Seimitsu Houseki Kabushiki Kaisha
    Inventors: Michel Ratajski, Susumu Shibata, Hajime Sasaki, Yoichi Yaguci
  • Patent number: D807224
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: January 9, 2018
    Inventors: Michel Ratajski, Susumu Shibata, Yukiharu Shimizu, Hidehiro Uchiumi