You can add all the high-tech features you want, but ultimately one of the best ways to make people buy gadgets is to ensure that the devices are the same ones already used by their friends.
That’s the concept behind a newly-published patent application, titled, “Collaborative Location-Based Search Results.” It describes a way in which multiple iPhone users in different locations can search for shared information — say, finding a restaurant or movie theater that’s equally convenient for every member of a group of friends to reach.