Patents by Inventor Efrayim Drezner

Efrayim Drezner 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).

  • Gemstone
    Patent number: D506410
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: June 21, 2005
    Inventor: Efrayim Drezner
  • Gemstone
    Patent number: D480013
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: September 30, 2003
    Inventor: Efrayim Drezner
  • Gemstone
    Patent number: D883133
    Type: Grant
    Filed: April 22, 2018
    Date of Patent: May 5, 2020
    Inventor: Efrayim Drezner