US3341782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for noise reduction in f-m telegraph signals
Assignee: Siemens Schweiz AG
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Filing: 1963-08-15
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Granted: 1967-09-12
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Expires: 1983-08-15
Abstract
No abstract record available.
Inventors
- 👤 Aemmer Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:30
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H04L27/144; H04L27/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A SYSTEM FOR REDUCING NOISE IN A RECEIVER FOR RECEIVING TWO-TONE FREQUENCY MODULATED SIGNALS, COMPRISING FIRST DEMODULATOR MEANS FOR DEMODULATING THE RECEIVED SIGNALS; SECOND DEMODULATOR MEANS CONNECTED TO SAID FIRST DEMODULATOR MEANS, AND SECOND DEMODULATOR MEANS INCLUDING PULSE FORMING MEANS FOR DERIVING A PULSE SEQUENCE FROM ONE OF SAID RECEIVED SIGNAL FREQUENCIES AND TIME DELAY MEANS FOR DELAYING SAID PULSE SEQUENCE; AND OUTPUT MEANS CONNECTED TO THE PULSE FORMING MEANS OF SAID SECOND DEMODULATOR MEANS FOR DETERMINING BY PULSES FROM SAID PULSE SEQUENCE ALTERNATING TIME POINTS OF FREQUENCY SHIFTS OF RECEIVED SIGNALS FROM HIGH TO LOW AND FROM LOW TO HIGH FREQUENCY.
Claim 2
Independent Claim
102 words
A SYSTEM FOR REDUCING NOISE IN A RECEIVER FOR RECEIVING TWO-TONE FREQUENCY MODULATED SIGNALS, COMPRISING FIRST DEMODULATOR MEANS FOR DEMODULATING THE RECEIVED SIGNALS; SECOND DEMODULATOR MEANS CONNECTED TO SAID FIRST DEMODULATOR MEANS, AND SECOND DEMODULATOR MEANS INCLUDING PULSE FORMING MEANS FOR DERIVING A PULSE SEQUENCE FROM ONE OF SAID RECEIVED SIGNAL FREQUENCIES AND TIME DELAY MEANS FOR DELAYING SAID PULSE SEQUENCE; AND OUTPUT MEANS CONNECTED TO THE PULSE FORMING MEANS OF SAID SECOND DEMODULATOR MEANS FOR DETERMINING BY PULSES FROM SAID PULSE SEQUENCE ALTERNATING TIME POINTS OF FREQUENCY SHIFTS OF RECEIVED SIGNALS FROM HIGH TO LOW AND FROM LOW TO HIGH FREQUENCY.
References Cited (Backward Citations)
US2652451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |