Patents by Inventor Clark McCarroll

Clark McCarroll 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).

  • Lock guard
    Patent number: 4686840
    Abstract: A lock guard to prevent picking of locks by thieves, which guard is particularly useful for mailboxes subject to weather and vending machines which store money. The guard is essentially a rectangular box having a side opening for insertion of the padlock and a pair of slots at right angles to each other, one slot below the side opening and the other at right angles on the front portion of the box. By clipping a key to a lever and inserting it in the first mentioned slot and then rotating it in the last mentioned slot the padlock may be unlocked.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: August 18, 1987
    Inventor: Clark McCarroll
  • Dog food bowl
    Patent number: D296020
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: May 31, 1988
    Inventor: Clark McCarroll
  • Combination coffee measuring scoop and rubber nipple
    Patent number: D304537
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: November 14, 1989
    Inventor: Clark McCarroll