(March 7, 2024, 3:02 PM EST) -- ALEXANDRIA, Va. — Crossing the “PH1VNA” and “PH1D84” corn varieties to arrive at a newly claimed “1PFHC43” corn variety was “well within the level of skill for a person of ordinary skill” in 2021, the effective date of a patent issued in 2023 to Pioneer Hi-Bred International Inc., a competitor tells the Patent Trial and Appeal Board in a March 6 petition for covered business method (CBM) review....