Patents by Inventor Mutsumi Negita

Mutsumi Negita 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: 4205248
    Abstract: A quartz crystal tuning fork vibrator having thin conductive film side electrodes and a method of forming same is provided. The quartz crystal vibrator is provided with identically configured electrodes on both planar surfaces of the tuning fork tines with the electrodes being peripherally positioned along the respective lengthwise extents of the times on both planar surfaces with thin conductive film electrodes being disposed on the lengthwise side surfaces of the tines in order to electrically couple the like configured electrodes peripherally disposed on the planar surfaces to each other. The quartz crystal plate and the electrodes formed on the opposed planar surfaces of the tines are formed by photo-etching, whereafter the planar surfaces are masked and a thin conductive film is spattered on the lengthwise edges to form the electrodes on the side surfaces.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: May 27, 1980
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventor: Mutsumi Negita
  • Patent number: 4176030
    Abstract: A quartz crystal tuning fork vibrator having thin conductive film side electrodes and a method of forming same is provided. The quartz crystal vibrator is provided with identically configured electrodes on both planar surfaces of the tuning fork tines with the electrodes being peripherally positioned along the respective lengthwise extents of the tines on both planar surfaces with thin conductive film electrodes being disposed on the lengthwise side surfaces of the tines in order to electrically couple the like configured electrodes peripherally disposed on the planar surfaces to each other. The quartz crystal plate and the electrodes formed on the opposed planar surfaces of the tines are formed by photo-etching, whereafter the planar surfaces are masked and a thin conductive film is sputtered on the lengthwise edges to form the electrodes on the side surfaces.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: November 27, 1979
    Assignee: Matsushima Kogyo Kabushiki Kaisha
    Inventor: Mutsumi Negita