{
  "patent_number": "US 174465",
  "country": "US",
  "title": "Alexander Graham Bell's Patent for the Telephone",
  "original_title": "Improvement in telegraphy",
  "summary": "Alexander Graham Bell's 1876 patent describing the method and apparatus for transmitting vocal sounds telegraphically, effectively inventing the telephone.",
  "what_it_does": "The patent describes a method of transmitting vocal or other sounds telegraphically by causing electrical undulations, similar in form to the vibrations of the air accompanying the said vocal or other sounds. It utilizes a transmitter that converts sound waves into electrical currents through the movement of an armature in a magnetic field. These currents are then sent over a wire to a receiver, which converts the electrical energy back into sound waves. This process allowed for the first successful transmission of intelligible human speech over a distance.",
  "what_it_does_not_cover": [
    "Does not cover digital signal processing or packet-switched voice transmission",
    "Does not cover wireless or cellular radio frequency transmission",
    "Does not cover modern fiber-optic voice communication systems"
  ],
  "filed": "1876-02-14",
  "granted": "1876-03-07",
  "expires": "1896-02-13",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Alexander Graham Bell",
      "url": "https://patentbrief.org/inventor/alexander-graham-bell"
    }
  ],
  "times_cited": 9,
  "tags": [
    "telecommunications"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/174465/bell-telephone",
  "markdown_url": "https://patentbrief.org/patent/us/174465/bell-telephone/md",
  "google_patents_url": "https://patents.google.com/patent/US174465",
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}