The ASME Digital Collection, previously known as the ASME Digital Library, is ASME’s repository of current and archival literature featuring: ASME's Transaction Journals from 1960 to the present, ASME's Conference Proceedings from 2002 to the present, ASME Press eBooks selected from 1993 to the present.
Scopus is a good starting point for finding articles on almost any topic. It contains over 47,000,000 records to scholarly publications, trade publications and conference proceedings. Scopus is an excellent database for cited reference searching. It does not contain full text articles, but users can get access to full text by using the Get It button.
ASTM Digital Library provides access to full text journals, special technical publications, manuals, data series, and terminology that covers a broad range of engineering disciplines. Coverage: 2000-current
Find articles and other information from the journals, proceedings and standards published by IEEE and by the Institution of Electrical Engineers. Full-text is from 1988 to present with some selected earlier content.
Patents are available via many search engines.
An excellent video from University of Central Florida shows how to use CPC (classification) codes to do a more accurate patent search.