Patents by Inventor Mark A. Irvin

Mark A. Irvin 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).

  • Patent number: 4986487
    Abstract: The disclosed invention relates to an automatic retracting tape measure with torsional bias adjustment. The spring for imparting the requisite bias is attached to a spindle within the tape measure housing. A portion of the spindle is exposed for actuation by a tool external to the housing to increase the bias on the spring as may be necessary.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: January 22, 1991
    Inventor: Mark A. Irvin