> ## Documentation Index > Fetch the complete documentation index at: https://docs.case.dev/llms.txt > Use this file to discover all available pages before exploring further. # Search USPTO patent applications > Search the USPTO Open Data Portal for US patent applications and granted patents. Supports free-text queries, field-specific search, filters by assignee/inventor/status/type, date ranges, and pagination. Covers applications filed on or after January 1, 2001. Data is refreshed daily. ## OpenAPI ````yaml /openapi.json post /legal/v1/patent-search openapi: 3.1.0 info: title: Case.dev API description: >- The AI-native platform for legal technology. Build smarter legal applications with our suite of AI-powered APIs. version: 1.0.0 contact: name: Case.dev Support email: support@casemark.com url: https://case.dev license: name: Proprietary url: https://case.dev/terms servers: - url: https://api.case.dev description: Production security: - bearerAuth: [] tags: - name: Vaults description: Secure document storage with semantic search and GraphRAG - name: Memory description: >- Persistent memory for AI agents with semantic search and 12 generic indexed tag fields - name: OCR description: Extract text from PDFs, images, and scanned documents - name: Voice description: Audio transcription and text-to-speech - name: LLMs description: Access 40+ language models through a unified API - name: Search description: Web search, AI answers, and deep research - name: Mail description: Managed inboxes for agent email workflows - name: Media description: Transcript retrieval and captioned media clip generation - name: Legal description: Legal research tools including citation verification - name: Privilege description: Privilege detection for e-discovery and litigation workflows - name: Compute description: Serverless GPU and CPU infrastructure - name: Format description: Document formatting and template rendering (MD/JSON to PDF/DOCX) - name: SuperDoc description: Document conversion and template automation - name: Webhooks description: Webhook endpoint management - name: System description: Public system metadata and discovery endpoints - name: Usage description: Usage reporting and webhook subscriptions - name: Database description: Serverless PostgreSQL databases with instant branching - name: Translation description: Language detection and translation for multilingual legal workflows - name: Skills description: Search and read legal AI skills for agents - name: Agents description: >- Create, manage, and execute AI agents with tool access, sandbox environments, and async run workflows - name: Matters description: Matter-native legal workspaces and orchestration primitives - name: Applications Projects description: Web application project management - name: Applications Deployments description: Web application deployment management - name: Applications Domains description: Custom domain configuration for applications - name: Applications Env Vars description: Environment variable management for applications paths: /legal/v1/patent-search: post: tags: - Legal summary: Search USPTO patent applications description: >- Search the USPTO Open Data Portal for US patent applications and granted patents. Supports free-text queries, field-specific search, filters by assignee/inventor/status/type, date ranges, and pagination. Covers applications filed on or after January 1, 2001. Data is refreshed daily. operationId: patentSearch requestBody: description: Patent search query and filters required: true content: application/json: schema: type: object required: - query properties: query: type: string description: >- Free-text search across all patent fields, or field-specific query (e.g. "applicationMetaData.patentNumber:11234567"). Supports AND, OR, NOT operators. minLength: 1 applicationStatus: type: string description: >- Filter by application status (e.g. "Patented Case", "Abandoned", "Pending") applicationType: type: string enum: - Utility - Design - Plant - Provisional - Reissue description: Filter by application type assignee: type: string description: Filter by assignee/owner name (e.g. "Google LLC") inventor: type: string description: Filter by inventor name filingDateFrom: type: string format: date description: Start of filing date range (YYYY-MM-DD) filingDateTo: type: string format: date description: End of filing date range (YYYY-MM-DD) grantDateFrom: type: string format: date description: Start of grant date range (YYYY-MM-DD) grantDateTo: type: string format: date description: End of grant date range (YYYY-MM-DD) limit: type: integer minimum: 1 maximum: 100 default: 25 description: Number of results to return (default 25, max 100) offset: type: integer minimum: 0 default: 0 description: Starting position for pagination sortBy: type: string enum: - filingDate - grantDate default: filingDate description: Field to sort results by sortOrder: type: string enum: - asc - desc default: desc description: Sort order (default desc, newest first) responses: '200': description: Patent search completed successfully content: application/json: schema: type: object properties: query: type: string description: Original search query totalResults: type: integer description: Total number of matching patent applications offset: type: integer description: Current pagination offset limit: type: integer description: Number of results returned results: type: array description: Array of matching patent applications items: type: object properties: applicationNumber: type: string description: Patent application serial number patentNumber: type: string description: Granted patent number (if granted) nullable: true title: type: string description: Invention title applicationType: type: string description: Application type (Utility, Design, Plant, etc.) status: type: string description: >- Current application status (e.g. "Patented Case", "Pending") filingDate: type: string format: date description: Date the application was filed nullable: true grantDate: type: string format: date description: Date the patent was granted nullable: true inventors: type: array items: type: string description: List of inventor names assignees: type: array items: type: string description: List of assignee/owner names entityStatus: type: string description: Entity status (e.g. "Small Entity", "Micro Entity") nullable: true '400': description: Bad request - invalid query or parameters '401': description: Unauthorized - invalid API key '403': description: Forbidden - insufficient permissions for Legal service '502': description: Bad gateway - USPTO API returned an error components: securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: API Key description: API key starting with `sk_case_` ````