{
  "generated_at": "2026-04-29",
  "quality_note": "Patent-to-theory bridge. Patent records are seeded and must not be treated as complete until authority PDFs, drawings, and claims are checked.",
  "record_count": 11,
  "scope_warning": "Wikipedia states that Steinmetz held over 200 patents, but the current Wikipedia bibliography lists only selected examples. This file seeds those listed examples and must not be treated as a complete patent bibliography.",
  "concept_to_patents": {
    "alternating current": [
      "US533244A"
    ],
    "alternating-current machinery": [
      "US559419A",
      "USRE11576E"
    ],
    "cooling": [
      "US865617A"
    ],
    "distributed constants": [
      "US1230615A"
    ],
    "eddy currents": [
      "US594145A"
    ],
    "effective resistance": [
      "US714412A"
    ],
    "electric discharge": [
      "US1025932A"
    ],
    "electromotive force": [
      "US533244A"
    ],
    "field excitation": [
      "US559419A",
      "USRE11576E"
    ],
    "heating": [
      "US1042986A"
    ],
    "high-frequency currents": [
      "US1230615A"
    ],
    "hysteresis and loss": [
      "US594145A"
    ],
    "illumination": [
      "US1025932A"
    ],
    "induction": [
      "US1042986A"
    ],
    "induction motor": [
      "US714412A",
      "US865617A"
    ],
    "inductor dynamo": [
      "USRE11576E"
    ],
    "ionization": [
      "US1025932A"
    ],
    "lightning surges": [
      "US1230615A"
    ],
    "magnetic field": [
      "US559419A"
    ],
    "magnetic flux": [
      "US559419A",
      "US594145A",
      "USRE11576E"
    ],
    "magnetic leakage": [
      "US1042986A"
    ],
    "magnetic reluctance": [
      "US594145A"
    ],
    "magnetomotive force": [
      "US717464A"
    ],
    "phase displacement": [
      "US533244A"
    ],
    "phase relation": [
      "US717464A"
    ],
    "polyphase currents": [
      "US533244A"
    ],
    "polyphase systems": [
      "US717464A"
    ],
    "power factor": [
      "US1042986A"
    ],
    "power measurement": [
      "US583950A"
    ],
    "quadrature": [
      "US583950A"
    ],
    "radiation": [
      "US1025932A"
    ],
    "reflection": [
      "US1230615A"
    ],
    "resistance loss": [
      "US865617A"
    ],
    "rotating magnetic field": [
      "US714412A"
    ],
    "slip": [
      "US714412A",
      "US865617A"
    ],
    "spectrum": [
      "US1025932A"
    ],
    "surge resistance": [
      "US1230615A"
    ],
    "symbolic method": [
      "US533244A"
    ],
    "three-phase systems": [
      "US583950A"
    ],
    "torque": [
      "US714412A",
      "US865617A"
    ],
    "transformer action": [
      "US1042986A"
    ],
    "transformers": [
      "US717464A"
    ],
    "wattless component": [
      "US583950A"
    ]
  },
  "records": [
    {
      "patent_number": "US533244A",
      "title": "System of distribution by alternating currents",
      "publication_date": "1895-01-29",
      "patent_url": "https://patents.google.com/patent/US533244A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US533244.pdf",
      "domain_tags": [
        "alternating-current distribution",
        "single-phase and polyphase systems",
        "phase displacement",
        "monocyclic system"
      ],
      "concept_links": [
        "alternating current",
        "polyphase currents",
        "phase displacement",
        "electromotive force",
        "symbolic method"
      ],
      "diagram_targets": [
        "distribution system diagram",
        "generator bank diagram",
        "phase-modifying coil regulation diagram",
        "geometrical phase-displacement diagram"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US559419A",
      "title": "Inductor-dynamo",
      "publication_date": "1896-05-05",
      "patent_url": "https://patents.google.com/patent/US559419A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US559419.pdf",
      "domain_tags": [
        "inductor dynamo",
        "synchronous generator",
        "magnetic flux",
        "machine economy"
      ],
      "concept_links": [
        "magnetic field",
        "magnetic flux",
        "field excitation",
        "alternating-current machinery"
      ],
      "diagram_targets": [
        "electric circuit diagram",
        "magnetic path sketch",
        "modified machine form"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US583950A",
      "title": "Three-phase induction-meter",
      "publication_date": "1897-06-08",
      "patent_url": "https://patents.google.com/patent/US583950A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US583950.pdf",
      "domain_tags": [
        "three-phase metering",
        "induction wattmeter",
        "quadrature",
        "unbalanced load"
      ],
      "concept_links": [
        "three-phase systems",
        "power measurement",
        "quadrature",
        "wattless component"
      ],
      "diagram_targets": [
        "meter connection diagram",
        "electromotive-force triangle",
        "phase-relation diagram"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US594145A",
      "title": "Inductor-dynamo",
      "publication_date": "1897-11-23",
      "patent_url": "https://patents.google.com/patent/US594145A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US594145.pdf",
      "domain_tags": [
        "inductor dynamo",
        "auxiliary air-gap",
        "eddy currents",
        "magnetic reluctance"
      ],
      "concept_links": [
        "magnetic reluctance",
        "eddy currents",
        "magnetic flux",
        "hysteresis and loss"
      ],
      "diagram_targets": [
        "end elevation of machine",
        "side elevation",
        "magnetic reluctance path diagram"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US714412A",
      "title": "Induction-motor",
      "publication_date": "1902-11-25",
      "patent_url": "https://patents.google.com/patent/US714412A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US714412.pdf",
      "domain_tags": [
        "induction motor",
        "squirrel-cage winding",
        "starting torque",
        "secondary resistance"
      ],
      "concept_links": [
        "induction motor",
        "slip",
        "torque",
        "effective resistance",
        "rotating magnetic field"
      ],
      "diagram_targets": [
        "motor sectional view",
        "secondary conductor arrangement",
        "resistance-varying disk",
        "secondary conductor detail"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US717464A",
      "title": "System of electrical distribution",
      "publication_date": "1902-12-30",
      "patent_url": "https://patents.google.com/patent/US717464A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US717464.pdf",
      "domain_tags": [
        "electrical distribution",
        "two-phase to three-phase transformation",
        "magnetomotive force",
        "phase conversion"
      ],
      "concept_links": [
        "polyphase systems",
        "phase relation",
        "magnetomotive force",
        "transformers"
      ],
      "diagram_targets": [
        "transformer-core diagram",
        "phase-vector diagram",
        "exciter connection diagram"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US865617A",
      "title": "Induction-motor",
      "publication_date": "1907-09-10",
      "patent_url": "https://patents.google.com/patent/US865617A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US865617.pdf",
      "domain_tags": [
        "induction motor",
        "high-resistance rotor",
        "fluid cooling",
        "reversing service"
      ],
      "concept_links": [
        "induction motor",
        "resistance loss",
        "cooling",
        "torque",
        "slip"
      ],
      "diagram_targets": [
        "motor section",
        "hollow conductor and end-ring cooling path"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US1025932A",
      "title": "Means for producing light",
      "publication_date": "1912-05-07",
      "patent_url": "https://patents.google.com/patent/US1025932A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US1025932.pdf",
      "domain_tags": [
        "electric lighting",
        "mercury arc",
        "spectral modification",
        "ionized vapors"
      ],
      "concept_links": [
        "illumination",
        "radiation",
        "spectrum",
        "electric discharge",
        "ionization"
      ],
      "diagram_targets": [
        "lamp construction views",
        "series circuit diagram",
        "modified lamp forms"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US1042986A",
      "title": "Induction-furnace",
      "publication_date": "1912-10-29",
      "patent_url": "https://patents.google.com/patent/US1042986A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US1042986.pdf",
      "domain_tags": [
        "induction furnace",
        "induction heating",
        "power factor",
        "magnetic leakage"
      ],
      "concept_links": [
        "induction",
        "magnetic leakage",
        "power factor",
        "transformer action",
        "heating"
      ],
      "diagram_targets": [
        "vertical furnace section",
        "horizontal furnace section",
        "step-down transformer relation"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "US1230615A",
      "title": "Protective device",
      "publication_date": "1917-06-19",
      "patent_url": "https://patents.google.com/patent/US1230615A/en",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/US1230615.pdf",
      "domain_tags": [
        "surge protection",
        "high-voltage transmission",
        "surge resistance",
        "high-frequency transients"
      ],
      "concept_links": [
        "surge resistance",
        "distributed constants",
        "lightning surges",
        "reflection",
        "high-frequency currents"
      ],
      "diagram_targets": [
        "transformer protection circuit",
        "inductance and shunt resistance arrangement"
      ],
      "research_status": "seeded_patent_record_needs_pdf_claim_and_drawing_extraction",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    },
    {
      "patent_number": "USRE11576E",
      "title": "Inductor-dynamo",
      "publication_date": "1896-11-24",
      "patent_url": "https://patents.google.com/patent/USRE11576E/",
      "pdf_url": "https://patentimages.storage.googleapis.com/pdfs/USRE11576.pdf",
      "domain_tags": [
        "reissue patent",
        "inductor dynamo",
        "magnetic paths",
        "machine construction"
      ],
      "concept_links": [
        "magnetic flux",
        "field excitation",
        "inductor dynamo",
        "alternating-current machinery"
      ],
      "diagram_targets": [
        "side elevation",
        "end elevation",
        "electric circuit diagram",
        "magnetic path sketch"
      ],
      "research_status": "seeded_patent_record_needs_reissue_lineage_review",
      "bridge_status": "seeded theory bridge; needs PDF, drawing, claim, and source-text verification"
    }
  ]
}