Idea recommendation.
Idea for a startup - Market for patents in the US was 333,530 patents filed IN 2019 (jump of 15%YOY) See Techcrunch article here with the stats.
See my forum post here about this news + few more ideas.
On a separate topic about this article. Knowing that over 300,000 patents were filed in the US last year also tells you there is a booming business sector here. Filing patents is a costly and time-consuming process, two great pain points to address.