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Registered trademark symbol
The registered trademark symbol (®) is a symbol that provides notice that the preceding word or symbol is a trademark or service mark that has been registered with a national trademark office. A trademark is a symbol, word, or words legally registered or established by use as representing a company or product. 〔(UK IPO, one example of a national trade mark office )〕〔(【引用サイトリンク】url=http://www.law.cornell.edu/uscode/text/15/1111 )〕 In some countries it is against the law to use the registered trademark symbol for a mark that is not officially registered in any country.〔
Trademarks not officially registered can instead be marked with the trademark symbol ™, while unregistered service marks are marked with the service mark symbol ℠. The proper manner to display these symbols is immediately following the mark, and is commonly in superscript style but is not legally required.
==Computer usage==
The registered trademark character has a standardized representation in most computer systems. It is mapped in Unicode as .〔http://www.unicode.org/charts/PDF/U0080.pdf〕 The registered trademark symbol ® is distinct, in computer representation, from the similar character
Because the ® symbol has not commonly been available on typewriters and ASCII-based computer systems, it has been common to approximate this symbol with the characters (R) (or (r)); for example, the Python programming language Trademark Usage Policy advocates this usage.〔PSF Trademark Usage Policy. https://www.python.org/psf/trademarks/ "The first or most prominent mention of a Python trademark should be immediately followed by a symbol for registered trademark: "®" or "(r)"."〕 However, these forms do not have legal force. Example of legal equivalents are the phrase ''Registered, U.S. Patent and Trademark Office'', which may be abbreviated to ''Reg U.S. Pat & TM Off.'',〔Gregory H. Guillot. A Guide to Proper Trademark Use. 1995–2007. http://www.ggmark.com/guide.html〕 in the U.S.,〔 and the letters ''RTM'' in the UK.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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