Patents by Inventor Thomas J. Landis

Thomas J. Landis 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).

  • Power of observation invisible ink game
    Patent number: 5217231
    Abstract: A power of observation game including two sets of visible images with each set including visible images substantially corresponding and with a preselected portion of at least one corresponding image of one set of visible images being visibly incomplete with the completing portion being printed invisibly to be artistically developed visible by an observing participant with a marking member to confirm correctness.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: June 8, 1993
    Assignee: Stry-Lenkoff Co.
    Inventor: Thomas J. Landis
  • Mix and match invisible ink game
    Patent number: 5160266
    Abstract: A learning association game wherein at least two series of images are visibly presented on at least one marking sheet with each of the images of one series being logically related to one of the images of the other series and with the images of each series being in different order to be selectively identified by a responding player with a marking instrument to visibly indicate indicia associated with at least one series of images, the game having a confirmation area associated therewith which includes the visible indicia and the correct invisible answers to be developed with the marking instrument.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: November 3, 1992
    Assignee: Stry-Lenkoff Company
    Inventor: Thomas J. Landis