Patent · US Expired

Data base locking

US4698752A · kind A · utility

48Cited by

9References

9Claims

0Family size

Assignee

American Telephone and Telegraph Company, AT&T Bell Laboratories · US

Inventors

Alan J. Goldstein · Livingston, US
Terry R. Nusser · Flemington, US

Key dates

Filing date	Apr 29, 1986
Grant date	Oct 6, 1987
Priority date	—
Expiry date	Apr 29, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S707/99938
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A data base system is disclosed in which records are locked out during record changing by using a dynamically generated directed acyclic graph of the records. The edges of the graph, stored in the records themselves, point toward a "root" record representing multiply-shared information. An application to the assignment of telephone facilities to telephone subscribers is also described. A transaction list is maintained to identify locked out records previously locked out during the same transaction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.