Patents by Inventor Wilbert C. Wallin

Wilbert C. Wallin 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).

  • Window lock structure
    Patent number: 3949525
    Abstract: A window and lock structure therefor for drawing the window sash tightly against the window frame, with the locking structure including a keeper on the window sash engageable by a locking shoe mounted on the frame and with the locking shoe having compound movement to engage the keeper and draw the sash tightly closed, with the movement of the locking shoe being derived from mechanism actuated by engagement with another part of the window sash as the window sash is closed.
    Type: Grant
    Filed: February 28, 1973
    Date of Patent: April 13, 1976
    Assignee: Truth Incorporated
    Inventors: Wayne C. Bates, Wilbert C. Wallin