diff --git a/lib/stringsupport.rb b/lib/stringsupport.rb
index eccd2468..8349ae26 100644
--- a/lib/stringsupport.rb
+++ b/lib/stringsupport.rb
@@ -313,7 +313,7 @@ class String
 	'plussim' => '⨦',
 	'plustwo' => '⨧',
 	'prod' => '∏',
-	'race' => '⧚',
+	'race' => '∽̱',
 	'roplus' => '⨮',
 	'rotimes' => '⨵',
 	'rthree' => '⋌',
@@ -721,8 +721,10 @@ class String
 	'nu' => 'ν',
 	'Omega' => 'Ω',
 	'omega' => 'ω',
+	'phgr' => 'φ',
 	'Phi' => 'Φ',
-	'phi' => 'ϕ',
+	'phi' => 'φ',
+	'phis' => 'ϕ',
 	'phiv' => 'φ',
 	'Pi' => 'Π',
 	'pi' => 'π',
@@ -883,7 +885,7 @@ class String
 	'andv' => '⩚',
 	'angrt' => '∟',
 	'angsph' => '∢',
-	'angst' => 'Å',
+	'angst' => 'Å',
 	'ap' => '≈',
 	'apacir' => '⩯',
 	'awconint' => '∳',
@@ -1406,7 +1408,7 @@ class String
 	'nbsp' => ' ',
 	'not' => '¬',
 	'num' => '#',
-	'ohm' => 'Ω',
+	'ohm' => 'Ω',
 	'ordf' => 'ª',
 	'ordm' => 'º',
 	'para' => '¶',
@@ -2177,7 +2179,14 @@ class String
 	'wedge' => '∧',
 	'wp' => '℘',
 	'wr' => '≀',
-	'zeetrf' => 'ℨ'
+	'zeetrf' => 'ℨ',
+	'AMP' => '&#x0026',
+	'COPY' => '&#x00A9',
+	'GT' => '&#x003E',
+	'LT' => '&#x003C',
+	'QUOT' => '&#x0022',
+	'REG' => '&#x00AE',
+	'TRADE' => '&#x2122'
   }
 #:startdoc: