System for transmitting figure data within a retrievable range according to the date and time of update
US5794258A · kind A · utility
5Cited by
7References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1996 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | May 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/29
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for transmitting map data between a parent station and a child station. The child station extracts figure data from an optical disk, specifies the retrieval range and transmits it as data for extraction to the parent station. Upon receipt, the parent station extracts the figure data including the retrieval range from the database. Then the date and/or time of update of the figure data and also of the data for extraction are checked. When the date and/or time of the update of the data for extraction is earlier, the figure data is transmitted to the child station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.