Patents by Inventor John I. Kulas

John I. Kulas 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).

  • Drill assembly
    Patent number: 5009271
    Abstract: Drill tools with eccentric bits for drilling a hole having a large diameter generally include a bit for swinging out to an eccentric position for drilling, and for swinging into a non-eccentric position for removal from a tubular casing. Relatively complicated structures are required for effecting bit movement, and it is often difficult to remove the bit for replacement or repair.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: April 23, 1991
    Inventors: Milan Maric, John I. Kulas