Patents by Inventor Kerstin Margaretha Hagland-Ahrnborg

Kerstin Margaretha Hagland-Ahrnborg 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).

  • Cradle gym
    Patent number: D245638
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: August 30, 1977
    Assignee: Brio Toy AB
    Inventor: Kerstin Margaretha Hagland-Ahrnborg
  • Audible toy
    Patent number: D246063
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: October 11, 1977
    Assignee: Brio Toy AB
    Inventor: Kerstin Margaretha Hagland-Ahrnborg
  • Audible toy
    Patent number: D246482
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: November 22, 1977
    Assignee: Brio Toy AB
    Inventor: Kerstin Margaretha Hagland-Ahrnborg
  • Toy rattle
    Patent number: D247455
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: March 7, 1978
    Assignee: Brio Toy AB
    Inventor: Kerstin Margaretha Hagland-Ahrnborg