Patents by Inventor John Risley

John Risley 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).

  • METHOD FOR CALCULATING STUDENTS' TIME SPENT ANSWERING QUESTIONS IN AN ON-LINE HOMEWORK SYSTEM
    Publication number: 20130143192
    Abstract: A computer software product and method are provided that calculate students' time spent interacting with an online homework and grading system. A computer software product and method are also provided for real-time capture of students' interactions with an online homework and grading system to produce timely updates to statistics on time spent answering questions. A computer program product and method are further provided to allow statistical data to be presented from WebAssign's online homework system without significantly increasing the IO requirements of the application database server.
    Type: Application
    Filed: May 29, 2012
    Publication date: June 6, 2013
    Inventors: John Risley, Roger Booth, Brian Marks
  • VSCF system with voltage estimation
    Patent number: 5438502
    Abstract: A voltage estimator for a generating system having a DC link and an inverter detects the magnitudes of the voltage and current on the DC link and develops an estimate signal representing the estimated magnitude of a fundamental component of output voltage developed by the inverter from the sensed DC voltage and current magnitudes.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: August 1, 1995
    Inventors: Gregory I. Rozman, John Risley