Patents by Inventor Alwyn K. Davis

Alwyn K. Davis 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: 4307716
    Abstract: An ovoid pessary for prevention of prolapse of the female organs through support thereof when inserted into the vaginal vault. Two elements are involved, one of body and the other a valve means, the latter having a set position for use whereby invaginate suction is effected by concavities on the body, and having a released position for withdrawal of the pessary without suction and providing means for manipulated removal. The two elements are made of soft pliable material and are readily disassembled for cleansing and re-use.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: December 29, 1981
    Inventor: Alwyn K. Davis
  • Patent number: 3983874
    Abstract: A menses collector adapted to be used during coitus for the collection of uterine discharge at the cervix thereby to isolate the same in a pocket retaining absorbtive material and preventing the same from entering into the vaginal vault. A removeable cover of supple material is attached to a pliant diaphragm, there being a yieldable opening in the cover to seal with the cervix opening therethrough into said pocket, and there being a rim at the perimeter of the diaphragm to seal with the vaginal walls and stabilizing the device between the fornix and the pubis symphysis.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: October 5, 1976
    Inventors: Alwyn K. Davis, Ward A. St. John