Patents by Inventor Harry S. Doolittle

Harry S. Doolittle 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: 4003523
    Abstract: A portable pill grinder comprising ceramic mortar and pestle units respectively having concave and convex pill crushing and grinding surfaces. Lower and upper clamping handles respectively support the mortar and pestle units and are pivotally connected together at adjacent end portions. The mortar and lower handle have cooperating grooves and upstanding flanges which prevent relative rotation therebetween. The pestle is supported for rotation about a short lug on the upper handle and has a laterally projecting handle for rotating the same. A stop is provided between the clamping handles to prevent crushing the mortar and pestle units. In use, the clamping handles are grasped in one hand, pressure is applied tending to crush one or more pills disposed in the mortar and engaged by the pestle, and the pestle handle is simultaneously swung back and forth with the other hand to effect a grinding action on the pills.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: January 18, 1977
    Inventor: Harry S. Doolittle