Patents by Inventor John L. Whetzal, Jr.

John L. Whetzal, 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).

  • Warning device for concrete finishing tool
    Patent number: 5235314
    Abstract: A warning or alerting device for a manually operated, concrete finishing tool may provide a flashing light, a beeping signal or both when the tool is being operated. The device may be attached to the extended handle of the tool. Use of the warning device will help prevent injury to coworkers or bystanders from the long handle of the tool as the working end of the tool is drawn back toward the operator.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: August 10, 1993
    Inventor: John L. Whetzal, Jr.