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History of US Copyright Terms
1790-01-01 00:00:01
14 years (28 years) — Copyright Act of 1790
1831-01-01 00:00:00
28 years (42 years) — Copyright Act of 1831
1909-01-01 00:00:00
28 years (56 years) — Copyright Act of 1909
1976-01-01 00:00:00
Life plus 50 years — Copyright Act of 1976
1998-01-01 00:00:00
Life plus 70 years — Copyright Term Extension Act of 1998
1998-10-07 00:00:00
Forever minus a day — Congressional Commentary
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