Patents by Inventor Gary A. Sinclair

Gary A. Sinclair 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).

  • Microphone signal attenuating apparatus for oxygen masks
    Patent number: 5307793
    Abstract: The microphone of a breathing mask such as an aircraft flight crew oxygen mask is disabled during inhalation to prevent transmission of air flow sounds. In the preferred embodiments, selected mechanisms determine when breathable gas has been delivered to the mask and in response, disable the microphone by disconnecting it during this time. In another embodiment, a cover shifts into position over the microphone to prevent or reduce reception of sounds thereby during delivery of gas to the mask.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: May 3, 1994
    Assignee: Puritan-Bennett Corporation
    Inventors: Gary A. Sinclair, Charles L. Vice, Michael Brumley, Tom McDonald
  • Portable clipboard and storage box
    Patent number: 4892334
    Abstract: A portable clipboard includes an integral storage box for transporting various accessories such as pens, pencils, erasers, rulers, calculators, etc. The writing surface of the clipboard is provided with a spring retaining clip for securing papers and is mounted by a hinge to a shallow rectangular box. In a second embodiment, a battery operated light is secured by a flexible stem on the upper surface of the clipboard and a digital clock is also provided.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: January 9, 1990
    Inventor: Gary A. Sinclair