Patents by Inventor Dwight S. Bisher

Dwight S. Bisher 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).

  • Security stop
    Patent number: 4958869
    Abstract: A security stop for a door or the like is provided which will prevent the door from opening inward by unauthorized persons. The device can be easily set between the door and the threshold and can be easily removed and stored for transportation purposes. The device comprises a wedge-shaped member which is forced underneath the door and includes an inverted V-shaped frame which acts as a brace to assist in holding the wedge-shaped member.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: September 25, 1990
    Inventor: Dwight S. Bisher