Patents by Inventor Richard K. Coleman, Jr.

Richard K. Coleman, Jr. 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).

  • Hourglass with bypass duct
    Patent number: 6260996
    Abstract: An hourglass that includes a mechanism for varying the amount of time measured with the hourglass. The hourglass includes a pair of reservoirs connected a constriction in a conventional manner, and includes a bypass duct that provides fluid communication between the reservoirs.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: July 17, 2001
    Inventor: Richard K. Coleman, Jr.