Patents by Inventor Wilbur P. Tisch

Wilbur P. Tisch 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).

  • Air sampling apparatus
    Patent number: 4235098
    Abstract: Air sampling apparatus having a housing covered by a roof which creates a passageway between the housing and the roof. The housing has an open upper end and a plate with a hole through it for mounting a filter and a blower by which air is drawn through the filter. A cover plate for the filter is provided with means for removing the plate when air is to be drawn through the filter and replacing the plate over the filter when the air blower is inoperative.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: November 25, 1980
    Inventor: Wilbur P. Tisch