Patents by Inventor Hans-Walter Roth

Hans-Walter Roth 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).

  • Method and apparatus for modulating the flow of lacrimal fluid through a punctum and associated canaliculus
    Patent number: 4915684
    Abstract: A lacrimal fluid modulating device for controlling the flow of lacrimal fluid through a punctum and associated canaliculus of a human eye comprising a generally cylindrical body member with an axial bore, an arcuate head member and peripheral placement and retaining members fashioned upon an exterior surface of the cylindrical body.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: April 10, 1990
    Inventors: Donald L. MacKeen, Hans-Walter Roth