Patents by Inventor Alexander S. Armstrong

Alexander S. Armstrong 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: 4215476
    Abstract: A health services combination irrigation and aspiration device adapted to serve more than one irrigation function and to require the use of only one hand by the operator. The instrument includes a handpiece, a supply station and a control for the regulation and selection among fluid and vacuum means. While the instrument is well adapted to dental work, particularly root canal methodology, it also supplies a need for a general purpose medical instrument which can provide suction and lavage of a tissue or organ surface with one or more of selected medicinal solutions, including distilled water or saline solution. Notably, the handpiece tip system is small enough to allow easy access to remote tissue surfaces while the angled design allows access to difficult to reach interior surfaces.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: August 5, 1980
    Inventor: Alexander S. Armstrong