US200521

URI: https://gptkb.org/entity/US200521
GPTKB entity
Statements (6)
Predicate Object
gptkbp:instanceOf gptkb:patent_number
gptkbp:country gptkb:United_States
gptkbp:documentType gptkb:US_patent
gptkbp:bfsParent gptkb:Thomas_Edison_phonograph
gptkbp:bfsLayer 9
https://www.w3.org/2000/01/rdf-schema#label US200521