Patents by Inventor Stefan Alexander Weissner

Stefan Alexander Weissner 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).

  • Methods and devices for extracting off-track motion using microactuators
    Patent number: 8934202
    Abstract: In certain embodiments, an apparatus includes a first piezoelectric (PZT) element poled in the same direction as a second PZT element. The first and second PZT elements are configured to be driven while simultaneously sensing motion. The apparatus further includes a circuit configured to add outputs of the first and second PZT elements, extract the sensed motion, and detect off-track motion from the extracted sensed motion.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: January 13, 2015
    Assignee: Seagate Technology LLC
    Inventors: Narayanan Ramakrishnan, Stefan Alexander Weissner
  • METHODS AND DEVICES FOR EXTRACTING OFF-TRACK MOTION USING MICROACTUATORS
    Publication number: 20130152695
    Abstract: In certain embodiments, an apparatus includes a first piezoelectric (PZT) element poled in the same direction as a second PZT element. The first and second PZT elements are configured to be driven while simultaneously sensing motion. The apparatus further includes a circuit configured to add outputs of the first and second PZT elements, extract the sensed motion, and detect off-track motion from the extracted sensed motion.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Narayanan Ramakrishnan, Stefan Alexander Weissner