Patents by Inventor Richard D. Havener

Richard D. Havener 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 for tuning musical instruments
    Patent number: 4481857
    Abstract: A method and apparatus including electronic circuitry for tuning a musical instrument. When a tunable vibratory or frequency producing element of the instrument is actuated, the oscillations thereby created are converted into an electrical signal. This signal is operated upon to eliminate harmonic components and is visually displayed on a readout device as a frequency registered in units of cycles per second for a predetermined period of time. If the vibratory element is actuated again within the predetermined period of time, the frequency of the new signal will be displayed, and if the vibratory element is not actuated again within the predetermined period of time, the display on the readout device will register zero.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: November 13, 1984
    Inventor: Richard D. Havener