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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| Application No. | Application Title | Issue Date |
| 20110153421 | Context-Based Selection and Presentation of Social Networking System Content and Advertisements A social networking system uses information that it obtains from and about its users to select social networking content and advertising for presentation to users in a way that optimizes for one or more optimization goals. Example optimization goals include monetization... | 06/23/2011 |
| 20110153412 | Selection and Presentation of Related Social Networking System Content and Advertisements A social networking system uses information that it obtains from and about its users to select social networking content and advertising for presentation to users in a way that optimizes for one or more optimization goals. Example optimization goals include monetization... | 06/23/2011 |
| 20110153377 | Mixing and Targeting Content Types/Items for Users to Promote Optimization Goals A social networking system uses information that it obtains from and about its users to select social networking content and advertising for presentation to users in a way that optimizes for one or more optimization goals. Example optimization goals include monetization... | 06/23/2011 |
| 20090070219 | TARGETING ADVERTISEMENTS IN A SOCIAL NETWORK A social networking website logs information about actions taken by members of the website. For a particular member of the website, the website presents targeted ads based on actions by the member and one or more characteristics of the member. The social networking webs... | 03/12/2009 |