The website climateviewer.com gives you, with regular updates, a list of patents which has also been featured on sites like geoengineeringwatch.org and naturalnews.com. It is interesting to note that this list includes patents which date back to 1891.
The site has a list of weather modification patents with their respective links and another list of geoengineering patents.
https://climateviewer.com/2014/03/24/geoengineering-weather-modification-patents/
Another website for you to find information about weather patents is:
https://patents.justia.com/patents-by-us-classification/239/14.1