Patent model for Levi Gilbert, “Plate for Artificial Teeth,” U.S. Patent 5447 (Feb. 15, 1848). An inscription reads “LEVI GILBERT.” Levi Gilbert was a confectioner in New Haven, Ct., who had the idea of using atmospheric pressure to help hold the plate in place.
Ref: Letter from Levi Gilbert, dated Aug. 18, 1861, reprinted in The Dental Cosmos 3 (1862): 178-179.
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