Patents by Inventor Frederick V. Topping

Frederick V. Topping 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).

  • Rotary device synchronizer
    Patent number: 4897635
    Abstract: A synchronization indicator for a pair of rotating devices compares pulses generated by the two devices cyclically respectively pro-portional to their rotary speeds by using a predetermined count of one set of pulses to determine the then count of the other set and uses the count of the other set to cyclically provide a progressive indication of relative speed of the devices.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: January 30, 1990
    Inventor: Frederick V. Topping