Patents by Inventor William A. Buchana

William A. Buchana 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: 5543589
    Abstract: Disclosed is a dual sensor comprising first and second touchpad sensors having different resolutions and being sandwiched to form a single sensor. Each of the touchpad sensors include a first plurality of electrically conductive strips positioned proximate to a second plurality of electrically conductive strips. The conductive strips in each plurality lie substantially in a single plane and the two pluralities are skewed relative to one-another in plan view. The conductive strips are separated by insulators that extend beyond the surface of the conductors to separate the conductors of one plurality from the conductors of the other plurality until a localized pressure is applied to a region of the pad. Two such touchpad sensors are sandwiched to form the dual sensor of the present invention. The two touchpad sensors are configured and positioned such that a single touch of a finger, stylus, or the like is capable of being detected by both sensors.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: August 6, 1996
    Assignee: International Business Machines Corporation
    Inventors: William A. Buchana, Richard A. Eardley, Anthony R. Tizzard, Brian G. Utley