Gideon Sundback (1880-1954) was a Swedish-American electrical engineer, who is most commonly associated with his work in the development of the zipper. He received a patent for the "separable fasterner" on 20 March 1917. My striped tie is special because it is zippered, not tied! Also I am wearing a cardigan to celebrate Sweater Day, honoring the birthday (on 20 March) of "Mister" Fred Rogers (1928-2003). The history of the cardigan sweater is interesting!
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