{
  "$type": "site.standard.document",
  "description": "A communication navigation system is provided with a communication center apparatus (3x) and a communication terminal apparatus (5x, 5y) (5x, 5y) for transmitting/receiving information via a communication network (1x). The communication center apparatus includes a database (302) for storing data to…",
  "path": "/patents/1091086",
  "publishedAt": "2003-12-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/3896",
    "PIONEER CORP [JP]"
  ],
  "textContent": "A communication navigation system is provided with a communication center apparatus (3x) and a communication terminal apparatus (5x, 5y) (5x, 5y) for transmitting/receiving information via a communication network (1x). The communication center apparatus includes a database (302) for storing data to be updated to the latest version, and a center side controlling device (301) for transmitting data in response to an updating request. The communication terminal apparatus includes a saving device (503) for saving data and the corresponding time and date information indicating the saving time and date of the data, and a terminal side controlling device (501x, 501y) for transmitting the updating request for transmitting the data over a predetermined period starting from the saving time and date, and updating the data by means of data transmitted in response to the updating request.",
  "title": "Updating of map data in a navigation device"
}