Patents by Inventor Leonard Grech

Leonard Grech 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).

  • Poly-powered optical system
    Patent number: 6172805
    Abstract: A lens system comprising a plurality of lenses have a peripheral region and a central region. The central region includes a first lens of nonunity power. The central region has a different field of view from the peripheral region.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: January 9, 2001
    Inventor: Leonard Grech
  • Burner control system
    Patent number: 4681084
    Abstract: A gas stove including at least one burner, a gas supply conduit for supplying gas to the burner, a solenoid valve in the gas supply conduit, a sensor for detecting the presence or absence of a utensil on a burner and a control circuit responsive to the sensor to open the solenoid valve when the utensil is on the burner and to slose the solenoid valve when the utensil is off the burner.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: July 21, 1987
    Assignee: George Catsouras
    Inventor: Leonard Grech
  • Adjustable power transmitting device
    Patent number: 4332147
    Abstract: An adjustable power transmitting device comprising a rotary input shaft mounted for rotation about a first axis and an output shaft mounted for rotation about a second axis. The output shaft is also mounted for pivotal movement about at least two non-parallel axes so that the position of the output shaft can be adjusted about both of these axes. The input shaft is drivingly coupled to the output shaft so that the input shaft can rotate the output shaft in all positions of the output shaft about the two non-parallel axes.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: June 1, 1982
    Inventor: Leonard Grech
  • Spectacles with a wide angle of vision and method
    Patent number: 4155626
    Abstract: Wide angle spectacles comprising a spectacle frame and a wide angle lens system attached to the frame. The wide angle lens system includes at least first and second lenses. The lenses are arranged so that light passes in series first through the first lens and then through the second lens in travelling to the eye of the user. The lens system materially increases the peripheral vision of the user.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: May 22, 1979
    Inventor: Leonard Grech
  • Adjustable power transmitting device
    Patent number: RE32415
    Abstract: An adjustable power transmitting device comprising a rotary input shaft mounted for rotation about a first axis and an output shaft mounted for rotation about a second axis. The output shaft is also mounted for pivotal movement about at least two non-parallel axes so that the position of the output shaft can be adjusted about both of these axes. The input shaft is drivingly coupled to the output shaft so that the input shaft can rotate the output shaft in all positions of the output shaft about the two non-parallel axes.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: May 12, 1987
    Inventor: Leonard Grech