FreePatentsOnline is a free web-based patent search resource offering full-text patent documents, PDFs and basic research tools for inventors and professionals.
USPTO is the official U.S. patent and trademark office, offering public search tools, filing systems, and legal resources for inventors and businesses.
MOLBASE is a chemistry data and dictionary platform offering compound lookups, chemical terminology references and supplier information for researchers and industry users.
A web-based lookup utility for searching International Patent Classification (IPC) codes, useful for patent research and prior-art screening workflows.
PatentLens, part of the Lens.org platform, supports patent and scholarly literature research with search, linking and analysis features for prior-art and portfolio work.
Patent Cloud is a web-based patent search and analytics platform for exploring patent documents, tracking technology trends, and supporting research workflows.
