Patents by Inventor Wayne N. Zako

Wayne N. Zako 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).

  • Material selective device
    Patent number: 5469235
    Abstract: A material selective device for projectors has a frame including a transparent top member and spaced opposed opaque side members that rests on the projector. A pair of opaque masking members slide in opposite sets of grooves in the inner faces of the side members to display only selected parts or all of material written on the top member or on a transparency supported by the device placed between the masking members or placed on the projector surface according to the selected positions of the masking members.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: November 21, 1995
    Inventor: Wayne N. Zako