US3344405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage and retrieval system
Assignee: International Business Machines Corp
•
Filing: 1964-09-30
•
Granted: 1967-09-26
•
Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 John L Craft
- 👤 Eugene R Floto
- 👤 John W Newitt
- 👤 Jr Howard J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/06; G06F3/0601; G06F12/00; G06F12/02; G06F12/06; G06F12/0638; G11; G11C; G11C13/00; G11C13/04; G06F3/0668; G06F3/0671; G06F3/0673; G06F3/0682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
230 words
A SYSTEM FOR STORING AND RETRIEVING DATA UNITS, EACH OF WHICH HAS AN IDENTIFIER COMPRISING: A MAIN MEMORY IN WHICH A PLURALITY OF DATA UNITS ARE STORED; AN AUXILIARY MEMORY IN WHICH RELATED DATA UNITS TO THOSE IN SAID MAIN MEMORY ARE STORED; AN ADDITIONAL MEMORY DEVICE CONTAINING ENTRIES INDICATING THE DATA UNITS STORED IN SAID AUXILIARY MEMORY, THE POSITION AT WHICH SUCH DATA UNITS ARE STORED IN SAID AUXILIARY MEMORY AND THE POSITION IN SAID MAIN MEMORY TO BEGIN SEARCHING FOR A DATA UNIT HAVING AN IDENTIFIER WHICH MORE NEARLY MATCHES THE DESIRED IDENTIFIER THAN THAT IN THE ADDITIONAL MEMORY DEVICE; MEANS FOR APPLYING THE IDENTIFIER FOR A DESIRED DATA UNIT TO SAID SYSTEM; MEANS FOR SCANNING THE ENTRIES IN SAID ADDITIONAL MEMORY DEVICE TO FIND THE ENTRY HAVING AN IDENTIFIER WHICH MOST NEARLY MATCHES THAT FOR SAID DESIRED DATA UNIT; MEANS FOR DETERMING IF THERE IS AN IDENTIFIER IN SAID MAIN MEMORY WHICH MORE NEARLY MATCHES THE IDENTIFIER OF SAID DESIRED DATA UNIT; MEANS RESPONSIVE TO A DETERMINATION THAT THE IDENTIFIER IN SAID ADDITIONAL MEMORY DEVICE IS THE ONE WHICH MOST NEARLY MATCHES FOR RETRIEVING THE DATA UNIT AT THE ADDRESS IN SAID AUXILIARY MEMORY INDICATED IN SAID ENTRY; AND MEANS RESPONSIVE TO A DETERMINATION THAT THE IDENTIFIER IN SAID MAIN MEMORY IS THE ONE WHICH MOST NEARLY MATCHES FOR RETRIEVING THE DATA UNIT FROM THE MAIN MEMORY.
Claim 2
Independent Claim
230 words
A SYSTEM FOR STORING AND RETRIEVING DATA UNITS, EACH OF WHICH HAS AN IDENTIFIER COMPRISING: A MAIN MEMORY IN WHICH A PLURALITY OF DATA UNITS ARE STORED; AN AUXILIARY MEMORY IN WHICH RELATED DATA UNITS TO THOSE IN SAID MAIN MEMORY ARE STORED; AN ADDITIONAL MEMORY DEVICE CONTAINING ENTRIES INDICATING THE DATA UNITS STORED IN SAID AUXILIARY MEMORY, THE POSITION AT WHICH SUCH DATA UNITS ARE STORED IN SAID AUXILIARY MEMORY AND THE POSITION IN SAID MAIN MEMORY TO BEGIN SEARCHING FOR A DATA UNIT HAVING AN IDENTIFIER WHICH MORE NEARLY MATCHES THE DESIRED IDENTIFIER THAN THAT IN THE ADDITIONAL MEMORY DEVICE; MEANS FOR APPLYING THE IDENTIFIER FOR A DESIRED DATA UNIT TO SAID SYSTEM; MEANS FOR SCANNING THE ENTRIES IN SAID ADDITIONAL MEMORY DEVICE TO FIND THE ENTRY HAVING AN IDENTIFIER WHICH MOST NEARLY MATCHES THAT FOR SAID DESIRED DATA UNIT; MEANS FOR DETERMING IF THERE IS AN IDENTIFIER IN SAID MAIN MEMORY WHICH MORE NEARLY MATCHES THE IDENTIFIER OF SAID DESIRED DATA UNIT; MEANS RESPONSIVE TO A DETERMINATION THAT THE IDENTIFIER IN SAID ADDITIONAL MEMORY DEVICE IS THE ONE WHICH MOST NEARLY MATCHES FOR RETRIEVING THE DATA UNIT AT THE ADDRESS IN SAID AUXILIARY MEMORY INDICATED IN SAID ENTRY; AND MEANS RESPONSIVE TO A DETERMINATION THAT THE IDENTIFIER IN SAID MAIN MEMORY IS THE ONE WHICH MOST NEARLY MATCHES FOR RETRIEVING THE DATA UNIT FROM THE MAIN MEMORY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |