Patents by Inventor James L. Baldwin

James L. Baldwin 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).

  • Patella recession instrument and method for anatomically-shaped patellar prostheses
    Patent number: 5716360
    Abstract: A patella recession instrument (10) and method provides a guide for producing an oval, tri-oval, or elliptically shaped recess on the posterior surface of the osteotomized patella for receiving a similarly shaped backing portion of a patellar implant. The apparatus includes a guide bushing (12) and a bushing positioning mechanism (14) for securing the bushing against the posterior of the osteotomized patella, with a guide opening (54) formed through the bushing covering the total area to be recessed. A reamer guide structure, which may be a separate structure (16) received in the bushing guide opening (54) or integrally formed with the bushing (12), receives one or more rotary reamer tools (18) in a plurality of reaming positions. The cutting face (80) of the rotary reamer tool (18) in each different reaming position covers a different portion of the total area to be recessed.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: February 10, 1998
    Assignee: U.S. Medical Products
    Inventors: James L. Baldwin, James M. Freid, Steven I. Whitlock, Mark L. Rehmann
  • Tibial prosthetic implant with offset stem
    Patent number: 5271737
    Abstract: A tibial prosthetic implant includes a base or base plate with an offset tibial stem. The base includes an inferior surface adapted to abut a resected surface of a patient's tibia and forms a base for articulating surfaces adapted to articulate with the patient's femoral condyles. The longitudinal center axis of the tibial stem extends from the inferior surface of the base and is offset from a center of the base. The offset places the stem in position to extend into the central canal of the tibia so that it does not substantially interfere with the cortical bone when the inferior surface of the base substantially abuts and aligns with the resected surface of the tibia.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: December 21, 1993
    Assignee: U.S. Medical Products, Inc.
    Inventors: James L. Baldwin, Steven I. Whitlock
  • Tibial prosthetic implant with offset stem
    Patent number: RE37277
    Abstract: A tibial prosthetic implant includes a base or base plate with an offset tibial stem. The base includes an inferior surface adapted to abut a resected surface of a patient's tibia and forms a base for articulating surfaces adapted to articulate with the patient's femoral condyles. The longitudinal center axis of the tibial stem extends from the inferior surface of the base and is offset from a center of the base. The offset places the stem in position to extend into the central canal of the tibia so that it does not substantially interfere with the cortical bone when the inferior surface of the base substantially abuts and aligns with the resected surface of the tibia.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: July 10, 2001
    Assignee: Hayes Medical, Inc.
    Inventors: James L. Baldwin, Steven I. Whitlock