Patents by Inventor Donald Heelis

Donald Heelis 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).

  • Medical swab device
    Patent number: 5000193
    Abstract: A device is described for expressing liquid absorbed by the tip of a medical swab. The device comprises a barrel and a plunger slidable within the barrel for squeezing the tip of the swab. Liquid is discharged through a flow channel in the container or in the swab shaft. The device is useful particularly to recover small volumes of swab-absorbed liquid where necessary e.g. to carry out clinical essays.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: March 19, 1991
    Assignee: ADI Diagnostics Inc.
    Inventors: Donald Heelis, Mark Semenuk, Robert Zawydiwski