{
  "patent_number": "US RE48925",
  "country": "US",
  "title": "How Printers Manage Power States and Sleep Timers",
  "original_title": "USRE48925E1 - Information processing apparatus, method for controlling power state shift and clearing or not clearing a shift time measured",
  "summary": "A method for printers to intelligently decide whether to reset their sleep timer based on the type of network activity they encounter.",
  "what_it_does": "This patent describes a power management system for printers that operate across four distinct power states. The system uses a timer to track how long the device has been in a low-power state (the third state) before it should shut down completely (the fourth state). The clever part is how it treats the timer when the printer wakes up partially: if the printer wakes up for a major task, like printing a document, it resets the timer. However, if it wakes up for a minor network inquiry that it cannot fully process, it keeps the original timer running, ensuring the printer still shuts down on schedule.",
  "what_it_does_not_cover": [
    "Does not cover power management systems that only use two or three power states.",
    "Does not cover devices that reset their sleep timer regardless of the type of network packet received.",
    "Does not cover power state transitions that are triggered by physical buttons rather than network events."
  ],
  "filed": "2018-03-22",
  "granted": "2022-02-08",
  "expires": null,
  "status": "active",
  "holder": "Canon Inc",
  "holder_url": "https://patentbrief.org/company/canon-inc",
  "inventors": [
    {
      "name": "Masahiro Takizawa",
      "url": "https://patentbrief.org/inventor/masahiro-takizawa"
    }
  ],
  "times_cited": 0,
  "tags": [
    "consumer_electronics",
    "mechanical",
    "energy"
  ],
  "abstract": "An information processing apparatus operating in a first power state, a second power state, a third power state, and fourth power state includes a power control unit configured to the third power state to the fourth power state when a first shift time is measured, and a control unit configured to, when the power control unit has shifted the power state of the information processing apparatus from the third power state to the first power state, clear the measured time and not to, when the power control unit has shifted the power state of the information processing apparatus from the third power state to the second power state, clear the measured time clear.",
  "url": "https://patentbrief.org/patent/us/RE48925/wrist-worn-activity-tracker",
  "markdown_url": "https://patentbrief.org/patent/us/RE48925/wrist-worn-activity-tracker/md",
  "google_patents_url": "https://patents.google.com/patent/USRE48925",
  "relatedPatents": []
}