Patents by Inventor Leonard Campbell

Leonard Campbell 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).

  • OXYGEN MASK RETENTION DEVICE AND METHOD FOR RETAINING AN OXYGEN MASK
    Publication number: 20030150459
    Abstract: A retention device and method for retaining an object, including preferably a gas mask, in position proximate a user's mouth. The retention device includes straps coupled to both sides of the object and having at ends thereof ear pieces. The ear pieces fit over the ears, and are configured to receive the strap at a point proximate the anterior, center portion of the ear, causing pulling forces to be on the posterior center portion of the ear rather than on the top of the ear.
    Type: Application
    Filed: June 12, 2002
    Publication date: August 14, 2003
    Inventor: George Leonard Campbell
  • Lubricating system for a weaving machine
    Patent number: 4693282
    Abstract: A weaving machine having a lubricating system for lubricating the surface of picking instrumentalities during the operation of the weaving machine by supplying controlled droplets of lubricant in the amount of 0.01 through 0.05 cc at predetermined intervals and at consistent pressure in the range of from 50 to 300 psi.
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: September 15, 1987
    Inventor: Leonard Campbell