US3140357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifrequency receiver
Assignee: AT&T Inc
•
Filing: 1962-06-28
•
Granted: 1964-07-07
•
Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Bischof Werner
- 👤 Theodore L Doktor
- 👤 Legedza Zenon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:33
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/444; H04Q1/45; H04Q1/453
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A MULTIFREQUENCY RECEIVER CAPABLE OF RECEIVING DIFFERENT GROUPS OF FREQUENCIES WHEREIN THE CONCURRENCE OF ONE FREQUENCY FROM EACH OF TWO GROUPS DISCRETELY REPRESENTS A DECIMAL DIGIT COMPRISING TWO PARALLEL CHAINS, DETECTION MEANS IN EACH OF SAID CHAINS TO DETECT THE INDIVIDUAL FREQUENCIES IN A DIFFERENT ONE OF SAID GROUPS, A PLURALITY OF SECOND MEANS IN EACH OF SAID CHAINS CAPABLE OF PRODUCING AN OUTPUT PULSE WHEN THE INPUT TERMINALS ARE ENERGIZED, TIMING MEANS ADAPTED TO BE OPERATED BY THE SIMULTANEOUS PRESENCE OF ONE INDIVIDUAL FREQUENCY FROM EACH GROUP, MEANS CONNECTING SAID TIMING MEANS TO EACH DETECTION MEANS AND SAID PLURALITY OF SECOND MEANS IN EACH CHAIN, MEANS FURTHER CONNECT-
Claim 2
Dependent Claim
109 words
A MULTIFREQUENCY RECEIVER CAPABLE OF RECEIVING DIFFERENT GROUPS OF FREQUENCIES WHEREIN THE CONCURRENCE OF ONE FREQUENCY FROM EACH OF TWO GROUPS DISCRETELY REPRESENTS A DECIMAL DIGIT COMPRISING TWO PARALLEL CHAINS, DETECTION MEANS IN EACH OF SAID CHAINS TO DETECT THE INDIVIDUAL FREQUENCIES IN A DIFFERENT ONE OF SAID GROUPS, A PLURALITY OF SECOND MEANS IN EACH OF SAID CHAINS CAPABLE OF PRODUCING AN OUTPUT PULSE WHEN THE INPUT TERMINALS ARE ENERGIZED, TIMING MEANS ADAPTED TO BE OPERATED BY THE SIMULTANEOUS PRESENCE OF ONE INDIVIDUAL FREQUENCY FROM EACH GROUP, MEANS CONNECTING SAID TIMING MEANS TO EACH DETECTION MEANS AND SAID PLURALITY OF SECOND MEANS IN EACH CHAIN, MEANS FURTHER CONNECT-
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |