US3299407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic digital computer provided with a drum type memory device
Assignee: Hitachi Ltd
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Filing: 1963-08-06
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Granted: 1967-01-17
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Expires: 1983-08-06
Abstract
No abstract record available.
Inventors
- 👤 Ikegami Kazutoshi
- 👤 Kamoi Akira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:40
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/16; B; B65; B65H; B65H81/00; B65H81/02; B65H81/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN AN ELECTRONIC DIGITAL COMPUTER, AN IMPROVEMENT COMPRISING A MOTOR-GENERATOR OPERATIVELY GENERATING AN A.C. OUTPUT; A MAGNETIC DRUM MEMORY DEVICE PROVIDED WITH WRITE-IN AND READ-OUT HEADS THEREOVER; CONNECTING MEANS FOR MECHANICALLY COUPLING SAID MOTOR-GENERATOR WITH SAID MAGNETIC DRUM IN SHAFT-TO-SHAFT COUPLING TOGETHER; AND CIRCUIT MEANS SUPPLIED WITH SAID OUTPUT OF SAID MOTOR-GENERATOR AND SUPPLYING A D.C. OUTPUT TO SAID COMPUTER.
Claim 2
Dependent Claim
60 words
IN AN ELECTRONIC DIGITAL COMPUTER, AN IMPROVEMENT COMPRISING A MOTOR-GENERATOR OPERATIVELY GENERATING AN A.C. OUTPUT; A MAGNETIC DRUM MEMORY DEVICE PROVIDED WITH WRITE-IN AND READ-OUT HEADS THEREOVER; CONNECTING MEANS FOR MECHANICALLY COUPLING SAID MOTOR-GENERATOR WITH SAID MAGNETIC DRUM IN SHAFT-TO-SHAFT COUPLING TOGETHER; AND CIRCUIT MEANS SUPPLIED WITH SAID OUTPUT OF SAID MOTOR-GENERATOR AND SUPPLYING A D.C. OUTPUT TO SAID COMPUTER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |