Patents by Inventor Leonard L. Paff

Leonard L. Paff 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).

  • Ribbon joint installer
    Patent number: 4527321
    Abstract: A manually operable device which is for forming contraction joints in wet concrete and which includes a quantity of ribbon held within an enclosed housing. The ribbon is fed through a channel part in the device housing and into the wet concrete.
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: July 9, 1985
    Inventor: Leonard L. Paff