Patents by Inventor Madeleine M. Calvert

Madeleine M. Calvert 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).

  • Rotary brush for removing hair from hair brushes
    Patent number: 4084282
    Abstract: A rotary brush for removing hair from hair brushes having a rotatable shaft upon which the bristles are mounted, a slotted portion extending along the full length of the shaft and a sharpened bladed portion slidably mounted in the slotted portion for cutting hair that had been removed by the rotary brush from hair brushes and became wound about the shaft thereof.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: April 18, 1978
    Inventor: Madeleine M. Calvert