Patents by Inventor Frederick J. Koolhof

Frederick J. Koolhof 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: 5403266
    Abstract: A cervical traction collar capable of ambulatory use by a patient comprises a pair of elongated overlying semi-rigid flexible upper and lower support members secured at their ends to encircle the neck, with releasable attachment means such as Velcro fasteners securing the overlying upper and lower support members for adjusting the height of the collar. A tubular, flexible, air-inflatable bladder is secured to the collar so as to project downwardly away from a bottom edge of the lower support member continuously around the bottom of the collar. The bladder is filled with air under pressure from a manually operated air pump to inflate the bladder so that it presses downwardly against the shoulder region of the patient continuously around the lower neck region.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: April 4, 1995
    Assignee: United States Manufacturing Company
    Inventors: Steven Bragg, Frederick J. Koolhof, Vick G. Bonessa