Patents Assigned to Emma A. MacDowell
  • Security device for attachment to the rails a movable door or window
    Patent number: 5197407
    Abstract: A security device in the form of a combination door or window stop comprising a housing for containing a canister of gas under pressure, a valve mechanism for releasing the gas through a sound generator upon unauthorized movement of an associated door or window, and means for selectively clamping the housing on the rail of the door or window.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: March 30, 1993
    Assignee: Emma A. MacDowell
    Inventor: James K. Sims
  • Audible alarm for doors and windows
    Patent number: D343804
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: February 1, 1994
    Assignee: Emma A. MacDowell
    Inventor: James K. Sims