Patents by Inventor George M. Pifer

George M. Pifer 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).

  • High security window/door apparatus
    Patent number: 5428924
    Abstract: A high security window apparatus is disclosed which gives the appearance of a multi-pane window. Two transparent panes in parallel, spaced apart relationship are mounted to the inner periphery of a sash. A grid of high structural integrity metal bars is situated in the air region formed between the transparent panes, each bar having opposed ends which are securely mounted to the inner periphery of the sash by a reinforcing mounting arrangement. The grid pattern of the metal bars gives the appearance of a multi-pane window.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: July 4, 1995
    Inventor: George M. Pifer