Patents by Inventor Robert L. Squires

Robert L. Squires 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).

  • Ultrasonic rodent control device and method
    Patent number: 4001817
    Abstract: A method and apparatus for controlling rodents is disclosed utilizing ultrasonic signals. The ultrasonic signals are of the square wave type. They are varied from approximately 28 to 20 KHz during the first time period of approximately 20 microseconds, then maintained at a frequency of approximately 20 KHz for a second time period of approximately 780 microseconds. The generated square wave signals are converted to sound waves by a transducer such as a speaker. The frequencies employed and the duration of these frequencies are selected to maximize the irritating effect upon the rodents.
    Type: Grant
    Filed: October 23, 1974
    Date of Patent: January 4, 1977
    Assignee: American Electronics Corporation
    Inventor: Robert L. Squires