Add trademark policy

Signed-off-by: Peter Hunn <peter@accordproject.org>

README.md

@@ -77,7 +77,7 @@ For code contributions, read our [CONTRIBUTING guide][contributing] and informat
 Accord Project source code files are made available under the [Apache License, Version 2.0][apache].
 Accord Project documentation files are made available under the [Creative Commons Attribution 4.0 International License][creativecommons] (CC-BY-4.0).
 
-Copyright 2018-2019 Clause, Inc.
+Copyright 2018-2019 Clause, Inc. All trademarks are the property of their respective owners. See [LF Projects Trademark Policy](https://lfprojects.org/policies/trademark-policy/).
 
 [linuxfound]: https://www.linuxfoundation.org
 [charter]: https://github.com/accordproject/cicero/blob/master/CHARTER.md