Patents by Inventor Helen B. English

Helen B. English 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).

  • Theatre structure
    Patent number: D277318
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: January 22, 1985
    Inventor: Helen B. English
  • Dome theatre structure
    Patent number: D279711
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: July 16, 1985
    Inventor: Helen B. English