Patents by Inventor Jack W. Fretwell

Jack W. Fretwell 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).

  • System to teach, measure and rate learner knowledge of basic mathematics facts
    Patent number: 6840774
    Abstract: A system for teaching basic arithmetic facts to students and for measuring their progress and rating their knowledge using a computer program that provides repetitive practice and immediate positive reinforcement is provided. The system features structured practice using problem sets of progressing levels of difficulty with problems selected randomly from each set. Progress made by individual students is tracked by generating a proficiency rating that reflects the arithmetic function tested, the level of difficulty of the problems presented, and the percentage of correct answers provided within a preset time period. Summary reports are generated and displayed at the end of each session as are the proficiency ratings.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: January 11, 2005
    Inventor: Jack W. Fretwell, Jr.
  • System to teach, measure and rate learner knowledge of basic mathematics facts
    Publication number: 20020164564
    Abstract: A system for teaching basic arithmetic facts to students and for measuring their progress and rating their knowledge using a computer program that provides repetitive practice and immediate positive reinforcement is provided. The system features structured practice using problem sets of progressing levels of difficulty with problems selected randomly from each set. Progress made by individual students is tracked by generating a proficiency rating that reflects the arithmetic function tested, the level of difficulty of the problems presented, and the percentage of correct answers provided within a preset time period. Summary reports are generated and displayed at the end of each session as are the proficiency ratings.
    Type: Application
    Filed: May 1, 2002
    Publication date: November 7, 2002
    Inventor: Jack W. Fretwell
  • Yieldable load release connector
    Patent number: 4370783
    Abstract: Yieldable load release connector comprising a coil of resilient plastic rod extending for 400.degree. to 800.degree. and having two free ends, and fastening means attached to the coil at a point spaced substantially equidistant from each said end for fastening said coil to a first object and the coil encircles a second object thereby connecting the two.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: February 1, 1983
    Inventor: Jack W. Fretwell, Jr.
  • Device for the accelerated launching of light sails
    Patent number: 4270477
    Abstract: Device for accelerating the launching of light sails comprising a set of smooth rings encircling the furled sail at intervals along its length and an elastic spacing line extending between the rings and between the uppermost ring and the top of the sail.
    Type: Grant
    Filed: September 7, 1978
    Date of Patent: June 2, 1981
    Inventor: Jack W. Fretwell, Jr.
  • Device for launching and dousing light sails such as spinnakers
    Patent number: RE29279
    Abstract: Device for aiding the launching and dousing of light sails comprising a set of smooth rings encircling the furled sail at intervals along its height enabling it to remain furled while being hoisted, launching the sail by moving the rings upwardly out of encircling engagement with the sail and dousing it by moving the rings downwardly into encircling engagement with the sail.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: June 28, 1977
    Inventor: Jack W. Fretwell, Jr.