Patents by Inventor Walker G. Petroff

Walker G. Petroff 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).

  • Anti-theft alarm system
    Patent number: 4030087
    Abstract: An anti-theft alarm system is provided for detecting a desired disturbance to an associated structure wherein a momentary disturbance of the structure causes the alarm to emit a short audible warning blast and if the disturbance continues, thereafterwards, the alarm will remain on until the alarm system is deactivated.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: June 14, 1977
    Assignee: Augustus E. Quattlebaum
    Inventors: Dale A. Ritchie, Walker G. Petroff, Roy G. Smarr, Jr.