This is what I’m seeing when I click on the link (along with a giant R symbol).
Wiki: Registered trademark symbol
The registered trademark symbol, designated by ® (a circled R also known as a Racol derived from Registered & Authorised COmpany Logo), is a symbol used to provide notice that the preceding mark is a trademark or service mark that has been registered with a national trademark office. [1] In some countries, including Hong Kong, it is against the law to use the registered trademark symbol for a mark that is not officially registered in any country. [1] Trademarks not so registered are instead marked with the trademark symbol ™, while unregistered service marks are marked with the service mark symbol ℠. The proper manner to display these symbols is immediately following the mark in superscript style.