Patents by Inventor John E. Towers

John E. Towers 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).

  • Mine tool bit with spring loaded button retainer
    Patent number: 4489987
    Abstract: A mine tool bit is retained in an open ended block with a cylindrical button insert transversely mounted in the shank of the bit, the insert having a cylindrical button extending radially outwardly from the shank and biased by a coil spring. The button must be manually depressed to insert or remove the bit from the block.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: December 25, 1984
    Inventors: John E. Towers, Robert E. Edwards