The concept of the "person of ordinary skill in the art" (POSITA) remains pivotal in patent law, particularly in evaluating obviousness under 35 U.S.C. § 103 and compliance with enablement and written description requirements...more
It is well-established that the availability of a prior art reference is dependent on the “effective filing date” of a patent or patent application. Any practitioner seeking to invalidate a patent knows that the ideal...more
The US Court of Appeals for the Federal Circuit clarified that a technical expert does not need to have been a person of ordinary skill in the art (POSITA) at the time of the invention. Instead, they may rely on...more
In part 1 of this series, I introduced the “on sale bar” and described how a commercial sale or offer for sale can negate patentability, according to the doctrine the Supreme Court established in Pfaff v. Wells Elecs., Inc....more