Patents by Inventor Marsha Van Dalen

Marsha Van Dalen 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).

  • Retinoscopy rack
    Patent number: D736380
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: August 11, 2015
    Inventors: Marsha Van Dalen, Johan T. W. Van Dalen
  • Retinoscopy rack
    Patent number: D736381
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: August 11, 2015
    Inventors: Marsha Van Dalen, Johan T.W. Van Dalen
  • Glare tester device
    Patent number: D782341
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: March 28, 2017
    Inventors: Marsha Van Dalen, Alice Epitropoulos
  • Tool for eye cleaning
    Patent number: D958333
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: July 19, 2022
    Inventors: Marsha Van Dalen, Johan Van Dalen, Katherine Mastrota