Patents by Inventor Howard W. Stemm

Howard W. Stemm 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: 4877040
    Abstract: The specification discloses a cigarette filter modifier and related method in which the pattern of tar and nicotine collection in a conventional cigarette filter is modified by the insertion into the filter of a hollow probe having laterally opening apertures therein which communicate with the interior passageway of the probe, combined with a base shield radiating from and surrounding said probe so as to block the passage of smoke, thereby forcing cigarette smoke to travel through the apertures and interior passageway of said probe. The probe apertures are located so that they open laterally with respect to the length of the probe.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: October 31, 1989
    Assignee: Bissell Health Care Corporation
    Inventors: Donald Jansma, Howard W. Stemm
  • Patent number: 4856540
    Abstract: The specification discloses a cigarette filter modifier and related method in which the pattern of tar and nicotine collection in a conventional cigarette filter is modified by the insertion into the filter of a hollow probe having apertures therein which communicate with the interior passageway of the probe, combined with a base shield radiating from and surrounding said probe so as to block the passage of smoke, thereby forcing cigarette smoke to travel through the apertures and interior passageway of said probe. The base shield is approximately the diameter of the cigarette, and its perimeter thereof defines the lateral extremes of the device so as to minimize its visibility.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: August 15, 1989
    Assignee: Bissell Health Care Corporation
    Inventors: Donald Jansma, Howard W. Stemm