Patents by Inventor Richard G. Halstead

Richard G. Halstead 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).

  • Motorized turntable for petri dish
    Patent number: 7105338
    Abstract: Improvements to turntables that facilitate inoculation of petri dishes. In one embodiment, the present invention is a motorized turntable for a petri dish that allows the user to use both hands for inoculation of the petri dish. In another embodiment, the present invention features an improved upper plate for a petri dish turntable that allows the user to more easily remove the petri dish from the upper plate after inoculation. In another embodiment, the present invention provides an apparatus for rotating a conventional turntable for petri dishes.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: September 12, 2006
    Inventors: Richard Holmes, Richard G. Halstead, Richard G. Malmquist, Douglass M. Nolte