DK

On January 27, 1936, Klara E.F. Braun of Copenhagen received a patent for a novel ear protector made of rubber, designed for use with electric hair curlers. Date of Application: 20 September 1934

On April 3, 1950, Lillian Julie Lyhr of Copenhagen patented a method for removing blackheads using tweezers with rounded rubber jaws. Her design allowed impurities to be safely extracted without injuring either the patient or the beautician.