U+229C Circled Equals
U+229C was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as NoDerivatives (symbol used for Creative Commons licenses).
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+229C forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
In mathematics, equality is a relationship between two quantities or, more generally, two mathematical expressions, asserting that the quantities have the same value, or that the expressions represent the same mathematical object. Equality between A and B is written A = B, and pronounced "A equals B". The symbol "=" is called an "equals sign". Two objects that are not equal are said to be distinct.
For example:
 $x=y$ means that x and y denote the same object.
 The identity $(x+1{)}^{2}={x}^{2}+2x+1$ means that if x is any number, then the two expressions have the same value. This may also be interpreted as saying that the two sides of the equals sign represent the same function.
 $\{x\mid P(x\left)\right\}=\{x\mid Q(x\left)\right\}$ if and only if $P\left(x\right)\iff Q\left(x\right).$ This assertion, which uses setbuilder notation, means that if the elements satisfying the property $P\left(x\right)$ are the same as the elements satisfying $Q\left(x\right),$ then the two uses of the setbuilder notation define the same set. This property is often expressed as "two sets that have the same elements are equal." It is one of the usual axioms of set theory, called axiom of extensionality.
Representations
System  Representation 

Nº  8860 
UTF8  E2 8A 9C 
UTF16  22 9C 
UTF32  00 00 22 9C 
URLQuoted  %E2%8A%9C 
HTML hex reference  ⊜ 
Wrong windows1252 Mojibake  âŠœ 
alias  NoDerivatives (symbol used for Creative Commons licenses) 
Elsewhere
Complete Record
Property  Value 

1.1 (1993)  
CIRCLED EQUALS  
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