Patents by Inventor Jacob M. Li

Jacob M. Li 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).

  • Evacuated hybrid ovenized oscillator
    Patent number: 6731180
    Abstract: The present invention is for a thermally controlled package for oscillators, particularly evacuated miniature surface acoustical wave oscillators (EMSO) devices. In a preferred embodiment the surface acoustical wave device is bonded directly to a heated substrate. The package is evacuated to improve temperature characteristics. A temperature heater, sensor, and control controller are utilized to maintain the internal package temperature above ambient. In one embodiment there is an additional substrate layer that house components that are not sensitive to temperature with interconnects electrically connecting the heated substrate and the additional substrates.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: May 4, 2004
    Assignee: Deleware Capital Formation Inc.
    Inventors: Roger L. Clark, Joseph V. Adler, Jacob M. Li
  • Oven-heated crystal resonator and oscillator assembly
    Patent number: 5917272
    Abstract: A crystal resonator assembly is described wherein a piezo-electric resonator is mounted over a heat conducting substrate and one or more heat generating elements are located on the substrate. The heating elements provide heat both by conduction and radiation and by virtue of the use of a heat conducting substrate enable a uniform and efficient heating of the crystal resonator to a desired oven temperature.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: June 29, 1999
    Assignee: Vectron, Inc.
    Inventors: Roger J. Clark, Samuel Shniper, Jacob M. Li, David Lane, Otmar Boser