Patents by Inventor Michael S. Mahan

Michael S. Mahan 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).

  • Working board for drilling rig
    Patent number: 4335792
    Abstract: A working board is attached to an oil derrick for a workman to stand upon while racking pipe. The board has arcuate slots with inner floor members and pivoting door covers for use when pipe is not in the slots thereby substantially eliminating the possibility of a workman falling. Pusher arms move the pipe to ready access for making the string.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: June 22, 1982
    Inventor: Michael S. Mahan