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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 |
| 4602700 | Fail-safe mechanical drive for syringe A high reliability drive arrangement produces a rate-controlled output displacement and is particularly suited for driving a medical infusion apparatus. Energy for producing the output displacement is derived from a wound spring which, in a preferred embo... | 07/29/1986 |
| 4559223 | Silver sulfadiazine and/or zinc sulfadiazine-containing toothpaste or oral medicament This invention discloses compositions useful as dentifrices or oral medicaments and capable of inhibiting microbial mouth infections. The compositions contain an effectiveamount of silver and/or zinc sulfadiazine and a suitable carrier. By inhibiting micr... | 12/17/1985 |
