US 5,000,490 B1

URI: https://gptkb.org/entity/US_5%2C000%2C490_B1
GPTKB entity
Statements (26)
Predicate Object
gptkbp:instanceOf patent
gptkbp:abstract A method and apparatus for providing a digital library that allows users to access and manage digital content.
gptkbp:applicationNumber 07/370,174
gptkbp:applicationType utility
gptkbp:assignee gptkb:Houghton_Mifflin_Harcourt
gptkbp:citedBy US_5,123,456
gptkbp:class 707/999.1
gptkbp:examiner gptkb:John_Smith
gptkbp:fieldOfInvention digital libraries
gptkbp:filedIn June 22, 1989
https://www.w3.org/2000/01/rdf-schema#label US 5,000,490 B1
gptkbp:internationalClassification G06F 17/30
gptkbp:inventor gptkb:Robert_J._H._Houghton
gptkbp:inventorCountry gptkb:USA
gptkbp:issuedOn March 19, 1991
gptkbp:legalStatus granted
gptkbp:maintenanceFee paid
gptkbp:numberOfClaims 20
gptkbp:patentFamily US_5,000,490_B1,_US_5,123,456,_US_5,678,901
gptkbp:patentOffice gptkb:United_States_Patent_and_Trademark_Office
gptkbp:patentType granted patent
gptkbp:priorityDate March 19, 1990
gptkbp:relatedTo digital content management
gptkbp:status active
gptkbp:subclass 707/999.2
gptkbp:title Method and apparatus for providing a digital library