US3135945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information checking system utilizing odd and even digit checks
Assignee: AT&T Inc
•
Filing: 1961-12-20
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Granted: 1964-06-02
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Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Richard M Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:04
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
CHECKING EQUIPMENT COMPRISING MEANS FOR SEQUENTIALLY RECEIVING ELEMENTS OF CODED INFORMATION CHARACTERS, A PAIR OF RELAY REGISTERS, A SEQUENCE CIRCUIT HAVING RELAYS FOR SEQUENTIALLY DIRECTING RECEIVED ODD ORDER ELEMENTS TO ONE OF SAID RELAY REGISTERS AND RECEIVED EVEN ORDER ELEMENTS TO THE OTHER RELAY REGISTER, MEANS CONTROLLED BY SAID REGISTER RELAYS FOR COMPARING THE REGISTERED ODD AND EVEN ORDER ELEMENTS, AND MEANS OPERATIVE UPON THE COMPLETION OF THE COMPARISON FOR INDICATING THE VALIDITY OF THE COMPARED ELEMENTS.
Claim 2
Dependent Claim
77 words
CHECKING EQUIPMENT COMPRISING MEANS FOR SEQUENTIALLY RECEIVING ELEMENTS OF CODED INFORMATION CHARACTERS, A PAIR OF RELAY REGISTERS, A SEQUENCE CIRCUIT HAVING RELAYS FOR SEQUENTIALLY DIRECTING RECEIVED ODD ORDER ELEMENTS TO ONE OF SAID RELAY REGISTERS AND RECEIVED EVEN ORDER ELEMENTS TO THE OTHER RELAY REGISTER, MEANS CONTROLLED BY SAID REGISTER RELAYS FOR COMPARING THE REGISTERED ODD AND EVEN ORDER ELEMENTS, AND MEANS OPERATIVE UPON THE COMPLETION OF THE COMPARISON FOR INDICATING THE VALIDITY OF THE COMPARED ELEMENTS.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |