Patents by Inventor Charles D. Fritch

Charles D. Fritch 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: 4906247
    Abstract: A system and method for folding a soft, plastic intraocular lens (IOL) for use by surgeons as a replacement for a person's cataractic lens. The lens is placed on a jig. The surgeon inserts a pair of forceps into a hollow soft plastic tube which is stretched by opening the forceps. The stretch plastic tube is placed over the lens while the surgeon releases the forceps and folds the tube about the lens thereby folding the lens within the stretched hollow tube. The folded lens and tube is inserted through a suitable incision within the eye and the lens allowed to unfold. The hollow tube is removed and the lens positioned as determined by the surgeon.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: March 6, 1990
    Inventor: Charles D. Fritch
  • Patent number: 4685920
    Abstract: A lens implant for use by surgeons as a replacement for a person's cataractic lens. The lens implant having a curved side and a plano side and in which the plano side has at least two arcuate ridges of variable height that varies from a minimum height at each end to a maximum height at the centermost portion. Each of the arcuate ridges also has an arcuate shape measured from the anterior side to the posterior side.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: August 11, 1987
    Inventor: Charles D. Fritch
  • Patent number: 4607622
    Abstract: An ocular endoscope having a minimum cross-section and designed primarily for use in treating, diagnosing and investigating problems associated with the eye. The probe associated with the endoscope comprises a first bundle of fiber optics carrying light for illumination, a second coaxial bundle of fiber optics terminating in a lens and adapted to view areas being illuminated completely surrounded by a plastic sheath that is semi-rigid and malleable and capable of assuming and holding a preferred shape. In the preferred embodiment a cross-sectional area is elliptical and the sheath contains a port in the area of maximum curvature, which port is adapted to receive a probe. The probe is preferably malleable and may be hollow for accepting instruments or fiber optics connected to an external source of coherent light in the form of a laser for treating purposes.
    Type: Grant
    Filed: April 11, 1985
    Date of Patent: August 26, 1986
    Assignee: Charles D. Fritch
    Inventors: Charles D. Fritch, John B. McAdams