Patents by Inventor Edgar K. Ragsdale

Edgar K. Ragsdale 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).

  • Soft cannula and methods for use
    Patent number: 6171282
    Abstract: A soft cannula including a flexible exosheath having a flexible, shape retainable annular member attached at one end. In one preferred embodiment the soft cannula includes a retrieval suture attached to the annular member. One end of the soft cannula is positioned within the patient's body cavity so that medical instruments may be inserted into the other and giving access to the patient's body cavity. The present invention also includes at least two preferred methods for inserting the soft cannula.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: January 9, 2001
    Inventor: Edgar K. Ragsdale