Patents by Inventor Alvin T. Levenberg

Alvin T. Levenberg 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).

  • Business forms dolly
    Patent number: D263820
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: April 13, 1982
    Assignee: Jefsteel Business Equipment Corp.
    Inventor: Alvin T. Levenberg
  • Personal security alarm
    Patent number: D361535
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: August 22, 1995
    Inventor: Alvin T. Levenberg
  • Personal security alarm
    Patent number: D371753
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: July 16, 1996
    Inventor: Alvin T. Levenberg