or download this
$ piconv -f ISO-8859-1 -t utf8 \
> -s '<meta http-equiv="Content-Type" content="text/html; charset=
+iso-8859-1">'
...
$ piconv -f ISO-8859-1 -t utf8 \
> -s '<meta name="registered sign" content="®">'
<meta name="registered sign" content="®">