{
  "patent_number": "US 1721530",
  "country": "US",
  "title": "How Jacob Schick Invented the Modern Magazine-Loading Safety Razor",
  "original_title": "Shaving implement",
  "summary": "A 1929 patent for a safety razor that uses a replaceable blade magazine, allowing users to change blades without touching the sharp edges.",
  "what_it_does": "This patent describes a shaving implement designed to hold a stack of blades in a magazine. The mechanism allows a user to feed a new blade into the shaving head while simultaneously ejecting the old, dull blade. By using a mechanical slide or plunger, the device ensures the blade is properly seated and aligned without the user ever needing to handle the dangerous metal edges directly.",
  "what_it_does_not_cover": [
    "Does not cover standard double-edge safety razors that require manual blade assembly.",
    "Does not cover electric shaving motors or oscillating blade mechanisms.",
    "Does not cover disposable plastic razors where the entire head is discarded."
  ],
  "filed": "1928-03-31",
  "granted": "1929-07-23",
  "expires": "1948-03-31",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Schick Jacob",
      "url": "https://patentbrief.org/inventor/schick-jacob"
    }
  ],
  "times_cited": 2,
  "tags": [
    "consumer_electronics",
    "mechanical"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/1721530/schick-repeating-razor",
  "markdown_url": "https://patentbrief.org/patent/us/1721530/schick-repeating-razor/md",
  "google_patents_url": "https://patents.google.com/patent/US1721530",
  "relatedPatents": [
    {
      "patentNumber": "775134",
      "countryCode": "US",
      "title": "How King Gillette Invented the Modern Disposable Safety Razor",
      "url": "https://patentbrief.org/patent/us/775134/safety-razor-gillette"
    },
    {
      "patentNumber": "1721815",
      "countryCode": "US",
      "title": "How the First Cotton Swabs Were Mass-Produced",
      "url": "https://patentbrief.org/patent/us/1721815/q-tip-cotton-swab"
    },
    {
      "patentNumber": "2390636",
      "countryCode": "US",
      "title": "How Laszlo Biro Invented the Modern Ballpoint Pen",
      "url": "https://patentbrief.org/patent/us/2390636/ballpoint-pen-biro"
    },
    {
      "patentNumber": "1219881",
      "countryCode": "US",
      "title": "How Gideon Sundback Invented the Modern Zipper",
      "url": "https://patentbrief.org/patent/us/1219881/zipper-separable-fastener"
    },
    {
      "patentNumber": "4492385",
      "countryCode": "US",
      "title": "How Modern Rollerblades Became Adjustable and Interchangeable",
      "url": "https://patentbrief.org/patent/us/4492385/inline-skates-rollerblade-olson"
    }
  ]
}