diff --git a/book/copyright/chapter.tex b/book/copyright/chapter.tex
index 41a6482..b17ef96 100644
--- a/book/copyright/chapter.tex
+++ b/book/copyright/chapter.tex
@@ -18,3 +18,9 @@ text}
 
 ARM\rtm{} is a registered trademark of ARM Limited in the 
 EU and other countries.
+
+IBM\rtm{} is a trademarks or registered trademark of International Business Machines 
+Corporation in the United States, other countries, or both.
+
+Intel\rtm{} and Pentium\rtm{} are trademarks of Intel Corporation or its subsidiaries 
+in the U.S. and/or other countries.