US 400,000,020 B2

URI: https://gptkb.org/entity/US_400%2C000%2C020_B2
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gptkbp:instanceOf patent
gptkbp:applicationNumber unknown
gptkbp:assignee unknown
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https://www.w3.org/2000/01/rdf-schema#label US 400,000,020 B2
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gptkbp:issuedBy gptkb:United_States_Patent_and_Trademark_Office
gptkbp:patentType utility
gptkbp:status active