Patents by Inventor Zachry Brierley

Zachry Brierley 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).

  • Shredder
    Patent number: 4172400
    Abstract: A shredder for shredding paper sheets in which a pair of buttress-threaded screws, one of left hand thread and one of right hand thread, are arranged side by side with their threads in mesh. The screws co-rotate in opposition directions so that paper sheets, fed therebetween, are shredded.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: October 30, 1979
    Inventor: Zachry Brierley