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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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Assignee: International Institute for Cotton (EN)

Location: Not specified.
No. of patents: 1

Number	Title	Issue Date
4038813	Spinning of twistless yarns by wet drafting A continuous process for the spinning of twistless yarn from staple fibres which comprises the steps of: A. drafting a sliver or roving containing not more than 80% by weight, based on the weight of fibre, of a liquid containing a dispersed potential bind...	08/02/1977