It depends on the type of copyright applied to the work. There is version called [c]
Creative Commons[/b]
From the Creative Commons site
https://creativecommons.org/about/
Creative Commons helps you legally share your knowledge and creativity to build a more equitable, accessible, and innovative world. We unlock the full potential of the internet to drive a new era of development, growth and productivity.
With a network of staff, board, and affiliates around the world, Creative Commons provides free, easy-to-use copyright licenses to make a simple and standardized way to give the public permission to share and use your creative workâon conditions of your choice.
Some things definitely require permission. Things such as trademarked or copyrighted graphics/images have both an implicit and explicit permission. If you are a merchant that accepts credit cards, you are granted implicit permission to use the logos for the cards that you accept in your marketing materials. If, on the other hand, you're a journalist writing about credit cards, it's best if you seek permission to use the logos... just to be safe.
Copyright is a whole different mess. From the U.S. Copyright Office publication Circular15A..
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjUl9DIrdHPAhXEJh4KHXYuAU8QFggcMAA&url=http%3A%2F%2Fwww.copyright.gov%2Fcircs%2Fcirc15a.pdf&usg=AFQjCNGa7IOi8vo6SpJhG9VaHmLYEOqBlA
life plus 70 years or 95 or 120 years, depending on the nature of authorship
Again, it's best to err on the side of caution and give proper citation and attribution. If you manage to secure
written permission, be sure to keep it on file.
(Having had to deal with both copyright and trademark issues for various jobs I've had kind of keeps this topic near the top of my 'things to remember' stack. Now, if only I could remember where that stack was! _
