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What is a reversion of copyright?

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Answer:

Copyleft is the practice of using copyright law to offer the right to distribute copies and modified versions of a work and requiring that the same rights be preserved in modified versions of the work. In other words, copyleft is a general method for making a program (or other work) free (libre), and requiring all modified and extended versions of the program to be free as well.

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Joshua

First answer by Joshua Fan. Last edit by Joshua Fan. Contributor trust: 1 [recommend contributor ]. Question popularity: 3 [recommend question].

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Relevant answers:

Is the copyright symbol protected by copyright?
No, for two reasons: as a government work, it is not subject to copyright protection, but also as such a short phrase (one letter!) it could only be protected as a trademark. Which it isn't.
Can you copyright after the original copyright expires?
No. Trademarks can be renewed, copyrights cannot.
Who copyright the copyright mark?
Nobody. It's public domain.
Why do we have copyrights?
In the United States, copyright extends from Article 1, Section 8, Clause 8 of the Constitution, "To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and...
Where can you get a copyright?
Copyright protection is automatic as soon as the work is fixed in a tangible medium (written down, recorded, sculpted, etc.). If formal registration is available in your country, it would generally...