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The International Patent Classification (IPC) is a hierarchical patent classification system used in over 100 countries to classify the content of patents in a uniform manner. It was created under the Strasbourg Agreement (1971), one of a number of treaties administered by the World Intellectual Property Organization (WIPO).
IPC is a trade association whose aim is to standardize the assembly and production requirements of electronic equipment and assemblies. IPC is headquartered in Bannockburn, Illinois, United States with additional offices in Washington, D.C. Atlanta, Ga., and Miami, Fla. in the United States, and overseas offices in China, Japan, Thailand, India, Germany, and Belgium.
The IPC-NC-349 format is the only IPC standard governing drill and routing formats. [5] XNC is a strict subset of IPC-NC-349, Excellon a big superset. Many indefinite NC files pick some elements of the IPC standard. [1] A digital rights managed copy of the specification is available from the IPC website, for a fee.
The subclass is then followed by a 1- to 4-digit "group" number, an oblique stroke and a number of at least two digits representing a "main group" ("00") or "subgroup". A patent examiner assigns a classification to the patent application or other document at the most detailed level which is applicable to its contents.
The main application is the construction, erection and operation of industrial plants where the number of documents of all engineering disciplines may sum up to some 100,000 documents. During 2024, the new cross-standard ISO / IEC 81355 [ 2 ] will be published and will replace the second edition of IEC 61355-1 published in 2008.
IfcPropertyDefinition captures dynamically extensible property sets. A property set contains one or more properties which may be a single value (e.g. string, number, unit measurement), a bounded value (having minimum and maximum), an enumeration, a list of values, a table of values, or a data structure.
An IPC standard has recently been developed and published to facilitate this data exchange, IPC-1752. [11] It is enabled through two PDF forms that are free to use. RoHS applies to these products in the EU whether made within the EU or imported. Certain exemptions apply, and these are updated on occasion by the EU.
Document comparison, also known as redlining or blacklining, is a computer process by which changes are identified between two versions of the same document for the purposes of document editing and review. Document comparison is a common task in the legal and financial industries.