US3123672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grator
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:47
CPC Classifications
H; H04; H04K; H04K1/00; H04K1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A SECURITY COMMUNICATIONS SYSTEM COMPRISING: FIRST MEANS FOR SUPPLYING AN INPUT SIGNAL, SECOND MEANS FOR ADDING A QUIETING VOLTAGE SIGNAL TO SAID INPUT SIGNAL, SAID QUIETING VOLTAGE SIGNAL HAVING A FREQUENCY INSIDE THE PASSBAND OF SAID SYSTEM, SIGNAL SCRAMBLING MEANS CONNECTED TO THE OUTPUTS OF SAID FIRST AND SECOND MEANS FOR RENDERING SAID INPUT SIGNAL UNINTELLIGIBLE, TRANSMISSION MEANS FOR SUPPLYING SAID UNINTELLIGIBLE SIGNAL TO UNSCRAMBLING MEANS FOR RENDERING SAID INPUT SIGNAL INTELLIGIBLE, OUTPUT MEANS CONNECTED TO SAID UNSCRAMBLING MEANS FOR REPRODUCING SAID INPUT SIGNAL, AND SQUELCHING MEANS RESPONSIVE TO SAID QUIETING VOLTAGE SIGNAL IN THE ABSENCE OF SAID INPUT SIGNAL FOR DISABLING SAID OUTPUT MEANS.
Claim 2
Dependent Claim
105 words
A SECURITY COMMUNICATIONS SYSTEM COMPRISING: FIRST MEANS FOR SUPPLYING AN INPUT SIGNAL, SECOND MEANS FOR ADDING A QUIETING VOLTAGE SIGNAL TO SAID INPUT SIGNAL, SAID QUIETING VOLTAGE SIGNAL HAVING A FREQUENCY INSIDE THE PASSBAND OF SAID SYSTEM, SIGNAL SCRAMBLING MEANS CONNECTED TO THE OUTPUTS OF SAID FIRST AND SECOND MEANS FOR RENDERING SAID INPUT SIGNAL UNINTELLIGIBLE, TRANSMISSION MEANS FOR SUPPLYING SAID UNINTELLIGIBLE SIGNAL TO UNSCRAMBLING MEANS FOR RENDERING SAID INPUT SIGNAL INTELLIGIBLE, OUTPUT MEANS CONNECTED TO SAID UNSCRAMBLING MEANS FOR REPRODUCING SAID INPUT SIGNAL, AND SQUELCHING MEANS RESPONSIVE TO SAID QUIETING VOLTAGE SIGNAL IN THE ABSENCE OF SAID INPUT SIGNAL FOR DISABLING SAID OUTPUT MEANS.
References Cited (Backward Citations)
US2178089A
Cited
US2463502A
Cited
US2418119A
Cited
US2709218A
Cited
US2480599A
Cited
US2851591A
Cited
US3020352A
Cited
US3056086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |