US3133991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for masking communication signals
Assignee: Patelhold Patenverwertungs and Elektro-Holding AG
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Filing: 1959-08-21
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Granted: 1964-05-19
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Expires: 1979-08-21
Abstract
No abstract record available.
Inventors
- 👤 Guanelia Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:45
CPC Classifications
H; H04; H04K; H04K1/00; H04K1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF SECRECY SIGNALLING BETWEEN A TRANSMISSION STATION AND A RECEIVING STATION WHICH COMPRISES THE STEPS OF ADDING AN ARBITRARILY VARYING SIGNAL TO AN INTELLIGENCE SIGNAL AT THE TRANSMISSION STATION TO OBTAIN A COMBINED SIGNAL AT THE TRANSMISSION STATION TO OBTAIN A COMBINED SIGNAL, TRANSFORMING ALL COMBINED SIGNALS WITH A VALUE GREATER THAN A GIVEN CONSTANT CORRESPONDING TO OR EXCEEDING THE MAXIMUM VALUE OF THE INTELLIGENCE SIGNAL BY SUBTRACTING FROM THE VALUE OF THE COMBINED SIGNALS A VALUE EQUAL TO SAID GIVEN CONSTANT OR AN INTEGRAL MULTIPLE THEREOF TO OBTAIN A TRANSMISSION SIGNAL WITH VALUES LYING BETWEEN ZERO AND SAID GIVEN CONSTANT, TRANSMITTING SAID TRANSMISSION SIGNAL TO THE RECEIVING STATION, SUBTRACTING THE SAME ARBITRARILY VARYING SIGNAL FROM THE TRANSMISSION SIGNAL, AND TRANSFORMING THE RESULTING SIGNAL BY ADDING A VALUE EQUAL TO SAID GIVEN CONSTANT OR AN INTEGRAL MULTIPLE THEREOF TO THEREBY RECONSTITUTE THE INTELLIGENCE SIGNAL.
Claim 2
Independent Claim
146 words
THE METHOD OF SECRECY SIGNALLING BETWEEN A TRANSMISSION STATION AND A RECEIVING STATION WHICH COMPRISES THE STEPS OF ADDING AN ARBITRARILY VARYING SIGNAL TO AN INTELLIGENCE SIGNAL AT THE TRANSMISSION STATION TO OBTAIN A COMBINED SIGNAL AT THE TRANSMISSION STATION TO OBTAIN A COMBINED SIGNAL, TRANSFORMING ALL COMBINED SIGNALS WITH A VALUE GREATER THAN A GIVEN CONSTANT CORRESPONDING TO OR EXCEEDING THE MAXIMUM VALUE OF THE INTELLIGENCE SIGNAL BY SUBTRACTING FROM THE VALUE OF THE COMBINED SIGNALS A VALUE EQUAL TO SAID GIVEN CONSTANT OR AN INTEGRAL MULTIPLE THEREOF TO OBTAIN A TRANSMISSION SIGNAL WITH VALUES LYING BETWEEN ZERO AND SAID GIVEN CONSTANT, TRANSMITTING SAID TRANSMISSION SIGNAL TO THE RECEIVING STATION, SUBTRACTING THE SAME ARBITRARILY VARYING SIGNAL FROM THE TRANSMISSION SIGNAL, AND TRANSFORMING THE RESULTING SIGNAL BY ADDING A VALUE EQUAL TO SAID GIVEN CONSTANT OR AN INTEGRAL MULTIPLE THEREOF TO THEREBY RECONSTITUTE THE INTELLIGENCE SIGNAL.
References Cited (Backward Citations)
US2266194A
Cited
US2836657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |