Thank YOU, explains the context: "Apple challenged the patents for validity and non-infringement, but its key contention is that Qualcomm is illegally charging

Thank YOU, explains the context: "Apple challenged the patents for validity and non-infringement, but its key contention is that Qualcomm is illegally charging smartphone makers twice for its intellectual property– once when it licenses its cellular patents and a second time when it sells modem chips used in smartphones. The legal concept is called patent exhaustion. http://www.sandiegouniontribune.com/business/technology/sd-fi-qualcomm-applehearing-20181029-story.html http://www.sandiegouniontribune.com/business/technology/sd-f... Otherwise would be like paying a sales tax at each transaction through the chain.