Assertion: symbol's use | /r/HasProperty | specified in the convention
Facets:
value: internationally
type: LOCATION
Source sentences:
text: Present in Europe since at least the mid-1960s, the use of the symbol in United States copyright law after 1971 was codified at 17 U.S.C. § 402 and is specified internationally in the Convention for the Protection of Producers of Phonograms Against Unauthorized Duplication of Their Phonograms.