This document provides an overview of patent searching for startups. It defines prior art, explains that the goal of a patent search is to find similar existing patents to determine patentability. A patent search should be performed to avoid wasting money on applications for unpatentable ideas and to file higher quality applications. For startups, the most cost effective approach is to do an initial preliminary search, then either file the patent application if nothing similar is found or pay for a professional search if something is found to further evaluate patentability. Professional searches are best avoided initially due to cost unless the invention is simple, in a low-tech field, not fully developed, marginally useful, uses old technology or strongly resembles an existing patent.
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