Patents by Inventor Fred L. Alberts, Jr.

Fred L. Alberts, Jr. 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).

  • Noise monitor
    Patent number: 4424511
    Abstract: A noise level monitoring and indicating system includes plural microphones distributed about a classroom, bus, etc. and adapted to drive individual counters to indicate the number of times a minimum sound level has been exceeded by the signal from the associated microphone. Visual indicators are also provided to indicate the instantaneous noise status at selected microphones.
    Type: Grant
    Filed: October 30, 1980
    Date of Patent: January 3, 1984
    Inventor: Fred L. Alberts, Jr.