User:Sj/©

Traditional rights

(all reserved)

© - canonical copyright in many places, including the US; includes default copyright

® - canonical registered mark

™ - canonical trademark, includes default trademark?

Copyleft rights

- easily confused with (c)

creative commons logo - also confusable with (c)

free content logo - covering 'free content definition' licenses - uniquely colorful & nested

Public domain and 'copycenter' rights

<there are few!>