Post by Ted Sichelman
Updated July 3, 2015
In a recent post on this blog, Janet Freilich asserts that “it is exceedingly difficult (if not impossible) to know if one is infringing a patent.” Freilich further contends that “larger numbers of patents exacerbate this problem,” and approvingly quotes Christina Mulligan and Timothy Lee’s claim that “In software, for example, patent clearance by all firms would require many times more hours of legal research than all patent lawyers in the United States can bill in a year.”
These views generally reflect the academic zeitgeist regarding “search costs” in patent law. However, they do not accord with my own experience. In this regard, I have conducted many hours of patent searches—first, when I founded and ran a venture-backed software company for five years, for which I regularly reviewed patents of competitors; and second, as a practicing attorney, which included reading thousands of patents in many different fields (from software to electronics to medical devices) for “freedom to operate” and prior art purposes.