Patents by Inventor Lester D. Park

Lester D. Park 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).

  • Drywall tool
    Patent number: 4610381
    Abstract: A drywall tool provides tactile and audible feedback to the user, as a fastener is driven by frequent multiple blows, to indicate when the fastener is properly driven, and the drywall dimpled, without tearing the paper facing of the drywall. Dimpling apparatus and a firing valve for controlling the multiple blows are described. A cam is provided to withdraw the magazine follower from the last fastener in a strip to avoid jamming or damage by a descending driver. Tool apparatus permits use of lightweight, synthetic parts.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: September 9, 1986
    Assignee: Senco Products, Inc.
    Inventors: Francis J. Kramer, Lester D. Park, Donald J. Massari, Jr.