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 |
| 6748857 | Crop mark setting device A printing press with crop mark setting device and process is provided. A printing couple for printing on a web is used with a lengthwise cutting device for cutting the printed web lengthwise into a first web strand and at least one second web strand. A convergence ... | 06/15/2004 |
| 4147126 | Coating apparatus Method and apparatus for simultaneously coating both surfaces of a moving web by a direct-indirect gravure technique in which the transfer roll of the indirect gravure system acts as backing roll for the direct gravure roll. The transfer roll is displacea... | 04/03/1979 |