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Among the eight patents, five are not valid, one is partially valid and only two are valid, the office said on Sept 30.

Amazon’s annual shareholder meeting is set for May 21 in Seattle.?Here’s the full text of Bezos’ letter, as filed with the Securities & Exchange Commission.

Among them, Gong Xiwen, a PhD candidate who has published in top-tier journals and developed a novel material platform called "quantum dots in perovskite solids", won the 2017 Extraodinary Potential Prize of ,000.

Amazon’s?growing advertising business is another example of its battle with Alphabet-owned Google. The companies compete across a number of areas such as voice technology, cloud computing, and online shopping.?Amazon has become a formidable e-commerce search engine,?competing with Google to be the first place where shoppers start when they want to buy products online.

Amazon’s main Android app?has been quietly but unceremoniously removed from the Google Play Store’s search after the Seattle-based company added support for downloading and installing apps from its Appstore. The app can still be found from its page in the Play store, but users who search for it won’t come up with results.