Copyright in the USA

What is the criteria for validity of the transfer of exclusive rights?
8
Additional 70 years after the author’s death
Must be in writing and signed by the owner of the rights conveyed or such owner’s duly authorized agent
How long copyright protection endures if a work was created after 1978?
8
Additional 70 years after the author’s death
Must be in writing and signed by the owner of the rights conveyed or such owner’s duly authorized agent
How many rights are protected by copyright law?
8
Additional 70 years after the author’s death
Must be in writing and signed by the owner of the rights conveyed or such owner’s duly authorized agent
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