You can begin your patent search using Google Patent Search

If this doesn't produce the results you need, the STEM librarian has put together a web resource guide on how to conduct a thorough patent search, Patent and Trademark Searching

NAICS Lookup from the U.S. Census Bureau

What is NAICS? The North American Industry Classification System or NAICS is a federal classification system used by Canada, Mexico, and the United States to classify business establishments for the purpose of collecting, analyzing, and publishing statistical data relating to the business economy. Such industry classification systems are useful for comparing data.

The Funded
Designed to help early stage entrepreneurs, fast growth entrepreneurs, and entrepreneurs looking to do diligence on funds before they execute funding arrangements and Board seats. 

Angel Capital Association
North America's professional alliance of angel groups