US3683413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for merging variable and fixed magnetic data on a credit card or the like
Assignee: International Business Machines Corp
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Filing: 1969-12-29
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Granted: 1972-08-08
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Expires: 1989-12-29
Abstract
Abstract A plurality of discrete magnetic bits are affixed to a record card in a predetermined low density pattern. High density information is subsequently recorded on said discrete bits by utilizing a magnetic head having a gap positioned at an oblique slant with respect to the discrete bits.
Inventors
- 👤 Carl E Schlaepfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:41
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/086; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/12; G06K7/00; G06K7/01; G06K7/016; G06K7/0163; G06K7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A method of recording and reproducing fixed and variable information on a card comprising the steps of permanently recording said fixed pattern on said card by affixing thereto a pattern of discrete magnetic bits, recording said variable information on said low density pattern of discrete magnetic bits through a transducer having a gap positioned at an oblique slant with respect to said discrete bits, passive transferring said fixed and variable magnetic information to a magnetizable copy medium, reading said variable information from said card, storing said variable information, saturation biasing said discrete bits, reading said fixed information from said card, rerecording said variable information or recording new variable information on said card.
Claim 2
Independent Claim
112 words
A method of recording and reproducing fixed and variable information on a card comprising the steps of permanently recording said fixed pattern on said card by affixing thereto a pattern of discrete magnetic bits, recording said variable information on said low density pattern of discrete magnetic bits through a transducer having a gap positioned at an oblique slant with respect to said discrete bits, passive transferring said fixed and variable magnetic information to a magnetizable copy medium, reading said variable information from said card, storing said variable information, saturation biasing said discrete bits, reading said fixed information from said card, rerecording said variable information or recording new variable information on said card.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |