http://www.copyright.gov/title17/92chap2.html#204 http://www.copyright.gov/title17/92chap2.html#204 "A transfer of copyright ownership, other than by operation

http://www.copyright.gov/title17/92chap2.html#204 http://www.copyright.gov/title17/92chap2.html#204 "A transfer of copyright ownership, other than by operation of law, is not valid unless an instrument of conveyance, or a note or memorandum of the transfer, is in writing and signed by the owner of the rights conveyed or such owner's duly authorized agent."