Patents by Inventor Craig R. Hassler

Craig R. Hassler 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).

  • Patent number: 4293302
    Abstract: An improved dental endosteal implant is disclosed. The implant comprises a base and a core. The base is comprised of a bio-compatible material and has first and second ends and side walls which include serrations having substantially planar surfaces facing in the direction of the second end. The depth of the serrations nearest said second end is greater than the depth of the serrations nearest the first end. The core is configured so as to permit cooperative engagement with at least one prosthetic crown.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: October 6, 1981
    Assignee: Scientific Advances, Inc.
    Inventors: Craig R. Hassler, Gary L. Messing
  • Patent number: 4011602
    Abstract: A device for attaching to substantially solid living bone tissue, comprising a body member having an outer surface shaped to fit approximately into an empty space in the tissue and having pores into which the tissue can grow to strengthen the bond between the device and the tissue, and adjustable means for expanding the body member against the tissue to an extent such as to provide a compressive stress capable of maintaining a snug and stable fit and of enhancing the growth of the tissue into the pores in the body member. The expanding means is adjustable to provide a stress between the tissue and the body member in the range of about 150 to 750 psi, typically 150 to 350 psi.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: March 15, 1977
    Assignee: Battelle Memorial Institute
    Inventors: Edmund F. Rybicki, Kenneth Ray Wheeler, Lewis E. Hulbert, Manuel Tom Karagianes, Craig R. Hassler
  • Patent number: 3940803
    Abstract: The present invention is a concept to provide a means of movement control for a powered prosthetic device. An externally detectable article is implanted on a biological site where the exertion of muscle tension will impart a movement of the article. The muscle can be attached to an antagonistic natural muscle or some means of exerting an opposing tension on the natural muscle. The recipient controlled tension in the appropriate muscle moves the externally detectable article and an external detector monitors that movement and generates control signals to the means powering the device in relation to the amount and direction of movement of the implanted article.
    Type: Grant
    Filed: May 6, 1974
    Date of Patent: March 2, 1976
    Assignee: Battelle Memorial Institute
    Inventors: Edmund B. Weis, Jr., Craig R. Hassler, John H. Flora