Patents by Inventor Donald J. Ryback

Donald J. Ryback 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).

  • Electrostatically sealed piezoelectric device
    Patent number: 4639631
    Abstract: A piezoelectric device package consists of a base and a cover which are sealed together to hermetically seal a piezoelectric device such as a quartz crystal therebetween. A recess in the cover receives the quartz crystal. Feedthrough holes in the base, or the cover, or both, which have electrostatic seals formed over them provide a means for making electrical connections with the quartz wafer while still maintaining the hermetic seal.
    Type: Grant
    Filed: July 1, 1985
    Date of Patent: January 27, 1987
    Assignee: Motorola, Inc.
    Inventors: Marc K. Chason, Carl A. Kotecki, Joseph P. Tomase, Michael J. Onystok, Donald J. Ryback, Robert G. Kinsman, Lawrence N. Dworsky, Kenneth J. Nield, Steven C. Moore