While you can search for patents directly from the patent offices around the world that grant them, there are some databases that allows you to search for patents as well. These do not exclusively contain patents, they also contain other kinds of documents.
Please ask if you have questions on finding the patent areas of these databases.
Pitchbook has set the login to an SSO. Instructions for accessing Pitchbook can be found here.
The PitchBook platform provides access to information about private companies, venture capital, private equity, and M&A transactions for startups and high growth companies, including pre- and post-money valuations, investment amounts, investment round (seed, series a, etc.), angel group and institutional investor names, and investee information (founder and CEO names, location, age, degrees, etc.).