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 |
| 5530196 | Chimeric genes for transforming plant cells using viral promoters In one aspect the present invention relates to the use of viral promoters in the expression of chimeric genes in plant cells. In another aspect this invention relates to chimeric genes which are capable of being expressed in plant cells, which utilize pro... | 06/25/1996 |
| 5416011 | Method for soybean transformation and regeneration A method for Agrobacterium-mediated transformation and regeneration of soybean is disclosed. The method utilizes a cotyledon explant which is prepared by first removing the hypocotyl and then tearing the two cotyledons apart at the cotyledonary node. The ... | 05/16/1995 |