Patents by Inventor Dorothea C. Erickson

Dorothea C. Erickson 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).

  • Whistle-cap device
    Patent number: 4121375
    Abstract: A whistle-cap device adapted for attachment to a container having a head and threaded section extending from said head. The device includes threads adapted to mate with the threaded section of the container and a whistle portion which is inoperative when the device is assembled on a container.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: October 24, 1978
    Assignee: Wallace A. Erickson & Company
    Inventors: Wallace A. Erickson, Dorothea C. Erickson