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Title: US4334270: Securities valuation system
[ Derwent Title ]

Country: US United States of America

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118 pages

Inventor: Towers, Frederic C.; Bethesda, MD 20034

Assignee: None

Published / Filed: 1982-06-08 / 1972-08-11

Application Number: US1972000279781

IPC Code: Advanced: G06F 17/30;
IPC-7: G06F 15/21;

ECLA Code: G06F17/30Z2P7; G06Q40/06;

U.S. Class: Current: 705/036.R; 707/E17.104;
Original: 364/300;

Field of Search: 235/451.1 340/172.5 444/001 364/300

Priority Number:
1972-08-11  US1972000279781

Abstract:     This discloses a method of operating a general purpose digital computer to produce securities portfolio valuation schedules for multiple simultaneous users. The computer maintains securities information in system-wide files which are updated, both electronically and manually, on a daily basis. The system permits each user to store information about his portfolios, as well as information about supplemental securities not contained in the system-wide files.

Attorney, Agent or Firm: Roberts and Stout ;

Primary / Asst. Examiners: Wise, Edward J.;

INPADOC Legal Status: None          Buy Now: Family Legal Status Report

Family: Show 3 known family members

First Claim:
Show all 5 claims
I claim:     1. The method of operating a general purpose digital computer having a plurality of data files, to allow a plurality of users to simultaneously retrieve information, while allowing the computer operator to update the information in said data files, comprising:
  • (a) providing each of said data files with a keyword through which said file is accessed,
  • (b) ordering said data in said data files in a sorted sequence, each data file having a separate sorted segment of data,
  • (c) providing an index file with a sequential string of correspondence fields containing, for each segment of sorted data, an associated keyword in a particularly sequence identifying a data file,
  • (d) providing a spare data file for editing the data on said files,
  • (e) immediately after said editing routine, exchanging the keywords in the fields of the index files corresponding to said unedited and edited data files,
  • (f) accessing said data files to retrieve a particular record by a comparison to determine said segment of data containing said record,
  • (g) searching said index file to determine the data file containing the segment of data including said record,
  • (h) reading the correspondence field of said segment of data to retrieve the keyword of the data file having the most recently edited version of said data segment,
  • (i) accessing said data file and retrieving said data record.

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Forward References: Show 124 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (124)   |   Backward references (0)   |   Citation Link

Foreign References: None

Other References:
  • File Organization and Data Mangement; Annual Review of Information Science and Technology, vol. 2, 1967, pp. 123-160, Jack Minker and Jerome Sable.

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