EDIT Copyright Sign Today, the US Patent and Trademark Office copyright sign is one of the most widely spread characters throughout the world and is unanimously understood as a copyright note although most people do not know its exact legal meaning.
 
EDIT Use of character The copyright sign is used in combination with the copyright holder\'s name and the year of first publication and is conspicuously displayed. It is spaced (Copyright © 2004 by name), omission of the words »Copyright« and »by« is optional (© 2004 name).

Under no circumstances should the outdated notation (c) be used - it dates back to the times when the proper copyright sign was not yet available on computers (leave alone typewriters). See also U+249E PARENTHESIZED LATIN SMALL LETTER C
 
EDIT Brand law - meaning The copyright sign © U+00A9 COPYRIGHT SIGN signifies copyright protection, or protection against liability for copyright infringement, and implies an economic claim.
 
ADD NEWSIMILAR CHARACTERS
01 CODE POINT VALUE: : : : : 00A9
02 NAME (UNICODE NAME) : : : COPYRIGHT SIGN
03 GENERAL CATEGORY: : : : : Symbol, Other
04 COMBINING CLASS : : : : : Spacing, split, enclosing, reordrant, and Tibetan subjoined
05 BIDIRECTIONAL CATEGORY: : Other Neutrals
06 DECOMPOSITION MAPPING : : -
07 DECIMAL DIGIT VALUE : : : -
08 DIGIT VALUE : : : : : : : -
09 NUMERIC VALUE : : : : : : -
10 MIRRORED: : : : : : : : : No
11 UNICODE 1.0 NAME: : : : : COPYRIGHT SIGN
12 ISO 10646 COMMENT FIELD : -
 
13  UPPERCASE MAPPING : : : : -
14 LOWERCASE MAPPING : : : : -
15 TITLECASE MAPPING : : : : -
16 DECIMAL VALUE : : : : : : 169
17 UTF-8 HEX VALUE : : : : : 0xC2A9
18 UTF-16 HEX VALUE: : : : : 0x00A9
19 UTF-32 HEX VALUE: : : : : 0x000000A9
20 XHTML : : : : : : : : : : &#169
21 BLOCK : : : : : : : : : : Latin-1 Supplement
22 PLANE : : : : : : : : : : Basic Multilingual Plane (BMP)
23 STROKE NUMBER : : : : : : -
24 RADICAL : : : : : : : : : -
 < CHARACTER >  BLOCK PROPERTIES
U+00A9 COPYRIGHT SIGN
DEUTSCH : ENGLISH