@JustANobody I found this from a quick google search, I hope it helps.
It is not within the last 2 years like you wanted but I tried.
As of the date of this article, there have been 26 cannabis plant patents issued by the U.S. Patent Office. The first patent was granted near the end of 2016. Then, after no issued cannabis patents for a couple of years, 3 were issued in 2019; 9 were issued in 2020; and 13 have been issued so far in 2021.