Patents by Inventor Felipe P. Perez

Felipe P. Perez 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).

  • Perpetual calendar
    Patent number: 5289649
    Abstract: A perpetual calendar is disclosed which contains base and top members and a rotating disk member in between. The top member has two arcuate window openings, through one of which is seen the days of the month, and through the other of which is seen numerical indicia corresponding to a particular year desired. The back of the base member carries a key to the year indicia in matrix form which is accompanied by instructions for its use.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: March 1, 1994
    Inventor: Felipe P. Perez