William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 6612130 | Necklace A necklace has an adjustable loop size so that anyone having a thick or a slender neck can wear a necklace of one size so which is adjustable that it fits the wearer best. A hook formed by bending a material is provided at an end of the string necklace, f... | 09/02/2003 |