Search the full-text of US patents provided by the United States Patent and Trademark Office - USPTO .
"The NTRS provides access to NASA's current and historical aerospace research and engineering results.
- NACA Collection: Citations and reports from the NACA Technical Report Server (TRS), 1915 to 1958.
- NASA Collection: Citations and documents created or sponsored by NASA, 1958 to present.
- NIX Collection: Citations and images, photos, movies and videos downloaded from the NASA Image eXchange and served out through NTRS." from web site
RefWorks is a Web-based bibliography and database manager that allows you to create your own personal database by importing references from text files or online databases. You can use these references in writing papers and automatically format the paper and the bibliography in seconds.