Patents Represented by Attorney, Agent or Law Firm John D. Winkelman
  • Surface wave termination for saw device
    Patent number: 4096455
    Abstract: A two stage surface wave termination for a surface acoustic wave device, such as a filter or delay line. The termination includes a wafer of an acoustically lossy, relatively hard polymeric material that is bonded to the surface of the SAW device's piezoelectric substrate between an end of the substrate and an interdigitated transducer provided thereon. A band of an elastomeric material is bonded to the substrate along the edge of the wafer nearest the transducer.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: June 20, 1978
    Assignee: Tektronix, Inc.
    Inventor: William Seth Drummond
  • Method of providing storage dielectric of phosphor particles coated with secondary emissive material
    Patent number: 4024298
    Abstract: An improved method for manufacturing a charge image storage dielectric capable of bistable storage is described. The storage dielectric is made by coating phosphor particles with a secondary emissive-forming substance, and then heating the coated particles to form secondary emissive material and simultaneously bond it to the surface of the phosphor particles.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: May 17, 1977
    Assignee: Tektronix, Inc.
    Inventor: Ralph Allen Mossman
  • Support stand for an oscilloscope or similar article
    Patent number: D244238
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: May 10, 1977
    Assignee: Tektronix, Inc.
    Inventors: James Alexander Hill, David Ray Hargis