A patent is a set of exclusive rights which has been granted by a sovereign state (or sometimes an intergovernmental organization). Such rights are granted to an inventor for a limited duration in exchange for detailed public disclosure of the invention. Patents typically prevent others from making or offering for sale those inventions.
Patents are generally granted by specific countries. Patent numbers often have prefixes that indicate which country granted the patent. For example, the patent US5577561A was generated from within the United States. Follow this link for a list of country codes. That said, you may also encounter patents that have been generated from the World Intellectual Property Organization (WIPO) which is an organization created by the United Nations in 1967.
Using the Web of Science platform, Derwent World Patents Index and Derwent Patent Citation Index combine to form this index of worldwide patents (1963 to the present) in chemical, electrical, electronic, and mechanical engineering. It includes data from over 14 million basic inventions and over 80 million patent documents drawn from 50 patent-issuing authorities worldwide. The database offers patent searching as well as cited patent searching, which allows you to find the patents that cite a patent or patents.
A comprehensive database offering access to standards, specifications, and technical documents from ASTM International, supporting research and compliance in materials and engineering.
Formerly known as American Society for Testing and Materials, ASTM International develops and delivers voluntary consensus standards to improve product quality, enhance health and safety, strengthen market access and trade, and build consumer confidence. ASTM Compass is the repository for industry standards and technical information produced by ASTM International. Content includes the Book of Standards, research reports, journals, manuals, monographs, technical papers and reports, data series, and market intelligence reports. It covers a broad range of engineering disciplines, including aerospace, biomedical, chemical, civil, environmental, geological, health and safety, industrial, materials science, mechanical, nuclear, petroleum, soil science, and solar engineering. Topics covered include Fatigue and Fracture Mechanics, Guide for Sampling and Analysis, Metallography and Resinography, Testing of Metallic and Inorganic Coatings, Performance and Durability of Building Sealants, and more.