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The IPC is the most widely used plumbing code in the United States and is also used as the basis for the plumbing code of several other countries [citation needed].Wide adoptions are important as they help reduce manufacturer and end-user costs by allowing the use of materials across a wide user base, thus allowing economies of scale in the production of materials used in construction.
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).
The Board of Health's plan consisted of 57 Sections covering many elements of a plumbing code. For example Section 1 states: "All materials must be of good quality and free of defects; the work must be executed in a thorough and workmanlike manner" and Section 9 requires that house-drains be made of iron with a "fall of at least one quarter of ...
In the United States, jurisdictions enact their own codes, some of which are based upon model plumbing codes. The most widely adopted plumbing code in the United States is the International Plumbing Code published by the International Code Council (ICC). This code is also used as the basis for the plumbing codes of some other countries.
Each classification term consists of a symbol such as "A01B33/00" (which represents "tilling implements with rotary driven tools"). The first letter is the "section symbol" consisting of a letter from "A" ("Human Necessities") to "H" ("Electricity") or "Y" for emerging cross-sectional technologies.
Searches based on patent classifications can identify documents of different languages by using the codes (classes) of the system, rather than words. Patent classification systems were originally developed for sorting paper documents, but are nowadays used for searching patent databases.
The metric codes still represent the dimensions in mm, even though the imperial size codes are no longer aligned. Problematically, some manufacturers are developing metric 0201 components with dimensions of 0.25 mm × 0.125 mm (0.0098 in × 0.0049 in), [ 31 ] but the imperial 01005 name is already being used for the 0.4 mm × 0.2 mm (0.0157 in ...
1A1A44J5 - Unit 1, Assembly 1, Sub-Assembly 44, Jack 5 (J5 is a connector on a box referenced as A44) 1A1A45J333 - Unit 1, Assembly 1, Sub-Assembly 45, Jack 333 (J333 is a connector on a box referenced as A45) A cable connecting these two might be: 1A1W35 - In the assembly A1 is a cable called W35. Connectors on this cable would be designated: