Engineering: a guide to library resources: Tech Reports

U.S. government-sponsored scientific, technical, and engineering research.

Energy-related research sponsored by the Department of Energy.

Indexes technical reports, conference papers, journal articles, and other publications sponsored by the National Aeronautics and Space Administration (NASA) and its predecessor, the National Advisory Committee for Aeronautics (NACA). NACA Reports, Technical Notes, and Technical Memoranda are full text from 1917–1958. Some NASA Reports are full text.

MultiSearch portal for the Department of Defense (DoD) unclassified/unlimited technical reports, Department of Energy (DoE) Energy Citations Database, NASA technical reports, Scitopia.org, and more. Some full text.

An online bibliographic database for the Building and Fire Research Laboratory Research Information Services (BFRLRIS) collection. Includes published reports, journal articles, conference proceedings, books, and audio/visual items.

Contains technical reports, conference proceedings, journal articles, and books on energy related topics including research and development, policy and planning, renewable energy technologies. Also indexes energy information from member countries of the International Energy Agency. Includes some full text.

Search for research and development reports, technical reports, and health, defense, environmental, and science resources from 12 major federal science agencies including the National Science Foundation, the Department of Interior, and the Environmental Protection Agency.

If you are having trouble viewing the documents at USPTO Google patents can help. Easy to use.