diff --git a/xep-0229.xml b/xep-0229.xml
index ca771701..124a8e8b 100644
--- a/xep-0229.xml
+++ b/xep-0229.xml
@@ -40,7 +40,7 @@
   </section1>
 
   <section1 topic='Background' anchor='background'>
-    <p>The "LZW" compression algorithm was originally developed by Abraham Lempel and Jacob Ziv, subsequently improved by Terry Welch <note>See "A Technique for High-Performance Data Compression", <cite>Computer</cite> (June 1984), pp. 8-19.</note>, and patented by Sperry Corporation (later Unisys Corporation) as U.S. Patent Number 4,464,650 <note>See &lt;<link url='http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=4,464,650'>http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=4,464,650</link>&gt;.</note>. This patent expired on June 20, 2003 <note>See &lt;<link url='http://compression-links.info/Link/1264_LZW_Patent_Expiration.htm'>http://compression-links.info/Link/1264_LZW_Patent_Expiration.htm</link>&gt; and <note>See &lt;<link url='http://compression-links.info/Link/1814_LZW_Patent_Expiration.htm'>http://compression-links.info/Link/1814_LZW_Patent_Expiration.htm</link>&gt;.</note>. Therefore implementations of LZW are no longer patent-encumbered.</p>
+    <p>The "LZW" compression algorithm was originally developed by Abraham Lempel and Jacob Ziv, subsequently improved by Terry Welch <note>See "A Technique for High-Performance Data Compression", <cite>Computer</cite> (June 1984), pp. 8-19.</note>, and patented by Sperry Corporation (later Unisys Corporation) as U.S. Patent Number 4,464,650 <note>See &lt;<link url='http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=4,464,650'>http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=4,464,650</link>&gt;.</note>. This patent expired on June 20, 2003 <note>See &lt;<link url='http://compression-links.info/Link/1264_LZW_Patent_Expiration.htm'>http://compression-links.info/Link/1264_LZW_Patent_Expiration.htm</link>&gt;</note> and <note>See &lt;<link url='http://compression-links.info/Link/1814_LZW_Patent_Expiration.htm'>http://compression-links.info/Link/1814_LZW_Patent_Expiration.htm</link>&gt;.</note>. Therefore implementations of LZW are no longer patent-encumbered.</p>
     <p>The algorithm is specified by Ecma International in &ecma151; under the name "DCLZ".</p>
   </section1>