Apparatus and method for user-selective data communication with verification
US5604487A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1803
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for communication of data from a holder to a customer or other requester of such data. The requester identifies to the holder a specific data product or other piece of data known to be held by the holder. The holder responds with a message acknowledging that request and providing at least one characteristic of the data so requested. The requester utilizes the information contained in that acknowledgement to determine whether the requester wants the data that it has so identified. The requester then informs the holder, based on that determination, whether the requester still wants the holder to provide that data to the requester. In response to that message from the requester, the holder either transmits the requested data, or awaits a further request from that requester, or terminates the communication. This apparatus and method further includes a provision for verification of proper communication of requested data. Upon receipt of requested data, the requester determines the value of a predetermined error checking or fault detection code such as a checksum. The requester then provides this value or code to the holder as part of the requester's acknowledgement …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.