Patents by Inventor Pierre Denise

Pierre Denise 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).

  • Mechanism for controlling the displacement of a straight edge on a drawing board
    Patent number: 4277896
    Abstract: Fixed on the board (1) is a support (8) in which is rotatably mounted a shaft (7) which is rigid with two pulleys (5a, 5b) each cooperating with guide means (3a, 3b) respectively for the straight-edge. Mounted between the support (8) and the shaft (7) are a rotary sleeve (14) and a spring which is wound around the shaft (7) and is rigid (at 19) with the shaft and (at 17) with the sleeve (14) in the support (12) but is withdrawable so as to permit the regulation of the torsion of the spring (18) and the balancing of the straight-edge.
    Type: Grant
    Filed: September 13, 1979
    Date of Patent: July 14, 1981
    Inventor: Pierre Denise