Patents by Inventor Ronald G. Stillman

Ronald G. Stillman 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).

  • Pushbutton purmutation code control means for a security alarm system
    Patent number: 4021796
    Abstract: An activation and deactivation circuit is provided for a security alarm system and includes selector means for selecting a predetermined coded number for enabling and disabling the alarm system. A coded circuit is responsive to the predetermined code from the selector to produce a control signal for enabling the alarm circuit when disabled and disabling the alarm circuit when enabled. Should an error in the predetermined coded number be detected, it is registered in a memory circuit and a second error will activate the alarm, thereby indicating tampering by unauthorized personnel.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: May 3, 1977
    Assignee: Detect-All Security Systems, Inc.
    Inventors: James M. Fawcett, Jr., Ronald G. Stillman