Patents by Inventor C. Lynwood Grisham

C. Lynwood Grisham 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).

  • Patent number: 4949771
    Abstract: A steel security door frame including a top frame member; a bottom frame member; a first side frame member; and a second side frame member. Each of the frame members include front and rear sections made up of diverse elements to form specific panel arrangements and trackways including a guideway for slidably receiving a movably glass panel and for allowing the movable glass panel to be moved between open and closed positions. Each of the front and rear sections are bent from sheet steel.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: August 21, 1990
    Inventors: Fred A. Grisham, C. Lynwood Grisham
  • Patent number: 4888924
    Abstract: A door frame assembly for being positioned between the edge of a door and the edge of a door opening in a wall. The assembly includes a door frame member for being attached to the door opening; and shim structure for being positioned between the door frame member and the edge of the door opening to reduce the space between the door frame member and the edge of the door.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: December 26, 1989
    Inventors: Fred A. Grisham, C. Lynwood Grisham
  • Patent number: 4850144
    Abstract: A door extension apparatus for use with a door having a bottom edge and having grooves in the bottom edge for normally receiving weather strips. The apparatus includes a first extension member for being secured to the grooves in the bottom edge of the door, the first extension member having a bottom edge, the bottom edge of the first extension member having grooves therein; and a second extension member for being secured to the grooves in the bottom edge of the first extension member.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: July 25, 1989
    Inventors: Fred A. Grisham, C. Lynwood Grisham
  • Patent number: 4438961
    Abstract: A door latch for latching a swingably mounted door. The latch includes a striker assembly which is operable in a dual capacity. First, the striker assembly is pivotally operable for accomplishing the unlatching action or is arcuately swung in the act of being withdrawn from the keeper socket, thus unlatching the door latch. Second, at least a portion of the striker assembly is rectilinearly operable for accomplishing the latching action as it slidably engages the lip of the keeper socket and is subsequently thrust into the keeper socket as the door continues to be fully closed thus latching the door latch. A shaft extends through the mainbody of the striker for facilitating the unlatchable swinging action thereof and which carries handle or knob structure at either end thereof to further facilitate unlatching and opening the door.
    Type: Grant
    Filed: April 23, 1982
    Date of Patent: March 27, 1984
    Assignee: Grisham Corporation
    Inventors: C. Lynwood Grisham, Freddie A. Grisham