Patents by Inventor William H. Meiklejohn

William H. Meiklejohn 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: 4800457
    Abstract: A magnetoresistive sensor which includes an element having a first layer that exhibits a magnetoresistive response, a second layer that magnetically biases the first layer and is in contact therewith, and possibly a substrate that contacts the first layer, with the first layer disposed between the second layer and the substrate. Of course, the first and second layers are interchangeable. Adjoining a side of the second layer is an anode contact and a cathode contact. The anode contact and the cathode contact are positioned on the side of the second layer such that they do not contact each other.
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: January 24, 1989
    Assignee: Carnegie-Mellon University
    Inventors: Mark Kryder, William C. Cain, William H. Meiklejohn
  • Patent number: 4245506
    Abstract: An improved sensor which responds to varying relative humidity by a change in impedance does not fail at 95-100 percent relative humidity. A microporous glass membrane or irradiated-and-etched plastic membrane contains a salt in its pores and has conductive coatings on both surfaces and hydrophobic films on the conductive coatings. At high humidities the pore fills with water and forms a bulge on the end of the pore because water will not wet the hydrophobic film. With proper choice of the pore radius no salt solution spills out.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: January 20, 1981
    Assignee: General Electric Company
    Inventor: William H. Meiklejohn