<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\000AE";
}
</style>
</head>
<body>
<p>Registered Trade Mark Sign using Hexa Decimal: ®</p>
<p>Registered Trade Mark Sign using HTML Code: ®</p>
<p>Registered Trade Mark Sign using HTML Entity: ®</p>
<p id="point">Registered Trade Mark Sign using CSS Entity: </p>
</body>
</html>