US3384705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facsimile privacy apparatus
Assignee: Individual
•
Filing: 1944-08-29
•
Granted: 1968-05-21
•
Expires: 1964-08-29
Abstract
No abstract record available.
Inventors
- 👤 Rosen Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:56
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/44; H04N1/448
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE COMBINATION OF MEANS FOR PRODUCING A SIGNAL COMPRISING MARKING AND SPACING VALUES AND MEANS FOR ENCIPHERING SAID SIGNAL; THE LAST-MENTIONED MEANS INCLUDING MEANS FOR FURNISHING A KEYING SIGNAL OF MARKING AND SPACING VALUES, A PULSE GENERATOR AND SYNCHRONIZING MEANS FOR CONTROLLING SAID PULSE GENERATOR AND KEY-FURNISHING MEANS; A TRIGGER CIRCUIT HAVING TWO CONDITIONS OF CONDUCTIVITY CONTROLLABLE BY SAID FIRST MENTIONED SIGNAL AND PULSES FROM SAID GENERATOR ACTING CONJOINTLY TO ASSUME ON CONDITION AND BY THE PULSE GENERATOR ALONE TO CAUSE THE SAME TO ASSUME ITS OTHER CONDITION; AND MEANS FOR COMBINING THE OUTPUT OF THE TRIGGER CIRCUIT AND THE KEYING SIGNAL.
Claim 2
Dependent Claim
102 words
THE COMBINATION OF MEANS FOR PRODUCING A SIGNAL COMPRISING MARKING AND SPACING VALUES AND MEANS FOR ENCIPHERING SAID SIGNAL; THE LAST-MENTIONED MEANS INCLUDING MEANS FOR FURNISHING A KEYING SIGNAL OF MARKING AND SPACING VALUES, A PULSE GENERATOR AND SYNCHRONIZING MEANS FOR CONTROLLING SAID PULSE GENERATOR AND KEY-FURNISHING MEANS; A TRIGGER CIRCUIT HAVING TWO CONDITIONS OF CONDUCTIVITY CONTROLLABLE BY SAID FIRST MENTIONED SIGNAL AND PULSES FROM SAID GENERATOR ACTING CONJOINTLY TO ASSUME ON CONDITION AND BY THE PULSE GENERATOR ALONE TO CAUSE THE SAME TO ASSUME ITS OTHER CONDITION; AND MEANS FOR COMBINING THE OUTPUT OF THE TRIGGER CIRCUIT AND THE KEYING SIGNAL.
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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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |