{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9804990","patent":{"patent_number":"US-9804990","title":"Sharing unclaimed USB devices as PCI devices","assignee":null,"inventors":[],"filing_date":"2014-08-27T00:00:00.000Z","publication_date":"2017-10-31T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F"],"num_claims":20,"abstract":"Examples of the disclosure safely share universal service bus (USB) devices with peripheral component interconnect (PCI) passthrough, and share devices in the USB hierarchy. An in-use counter is maintained for the USB bus and/or for USB hubs. The in-use counter is checked and adjusted when a VM or entity claims and/or unclaims a device. For example, when a PCI passthrough of a USB host controller device is requested, the global in-use counter is checked to determine whether to grant the request. When a VM or entity requests to claim a USB hub, the in-use counter is checked to determine whether to grant the request. The in-use counter indicates whether any USB device attached has been claimed and/or whether the USB host controller device has been claimed by a PCI passthrough operation."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Sharing unclaimed USB devices as PCI devices","description":"Examples of the disclosure safely share universal service bus (USB) devices with peripheral component interconnect (PCI) passthrough, and share devices in the USB hierarchy. An in-use counter is maint","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9804990","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9804990","citation_suggestion":"Patentable. \"Sharing unclaimed USB devices as PCI devices\" (US-9804990). https://patentable.app/patents/US-9804990","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9804990","json":"https://patentable.app/api/llm-context/US-9804990","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:45:26.655Z"}