The NLR has published an interesting overview of IP in the US cannabis sector. Here is the introduction to their piece.
The year 2020 saw increasing acceptance of cannabis in the US, as indicated by legalization in another five states, proposed federal legalization, and the designation of cannabis (where available) as essential during the coronavirus pandemic. The United Nation’s recent reclassification of cannabis signals similar changes on a global scale. As a result of these changes, cannabis “growing” has evolved into a $14 billion industry in the US for which the benefits of federal laws, including bankruptcy and trademark protections, have been sometimes uncertain. The benefits of the US patent laws, however, are broadly available to innovators, and as demonstrated in 2020, this includes plant patents on cannabis.