Patent US2649571A successfully refreshed from Google Patents.
Patent US3304508A successfully refreshed from Google Patents.
US3304508A
Expired / Lapsed
US
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Level regenerating arrangement for transmission of bipolar signals
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1965-01-21
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Granted: 1967-02-14
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Danielsen Sigurd Pareli
- 👤 Johnsen Eidar Hermann
- 👤 Widl Walter Herbert Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:58
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/06; H04L25/061; H04L25/065; H03; H03K; H03K5/00; H03K5/01; H04L25/063; H04L25/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
APPARATUS FOR REGENERATING BIPOLAR SIGNALS COMPRISING: FIRST SIGNAL SUMMING MEANS HAVING FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL, SAID FIRST INPUT TERMINAL BEING ADAPTED TO RECEIVE THE BIPOLAR SIGNALS; A SECOND SIGNAL SUMMING MEANS HAVING FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID FIRST SIGNAL SUMMING MEANS TO THE FIRST INPUT TERMINAL OF SAID SECOND SIGNAL SUMMING MEANS; A LIMITING AMPLIFIER MEANS HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL FOR TRANSMITTING A SIGNAL FROM THE OUTPUT TERMINAL WHICH SWITCHES BETWEEN TWO POLARITIES IN ACCORDANCE WITH THE POLARITY OF THE SIGNAL RECEIVED AT THE INPUT TERMINAL; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID SECOND SIGNAL SUMMING MEANS TO THE INPUT TERMINAL OF SAID LIMITING AMPLIFIER MEANS; A CONTROLLED ATTENUATOR MEANS HAVING AN INPUT TERMINAL, AN OUTPUT TERMINAL AND A CONTROL TERMINAL FOR CONTROLLING THE ATTENUATION OF A SIGNAL RECEIVED AT THE INPUT TERMINAL IN ACCORDANCE WITH A CONTROL SIGNAL RECEIVED AT THE CONTROL
Claim 2
Dependent Claim
165 words
APPARATUS FOR REGENERATING BIPOLAR SIGNALS COMPRISING: FIRST SIGNAL SUMMING MEANS HAVING FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL, SAID FIRST INPUT TERMINAL BEING ADAPTED TO RECEIVE THE BIPOLAR SIGNALS; A SECOND SIGNAL SUMMING MEANS HAVING FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID FIRST SIGNAL SUMMING MEANS TO THE FIRST INPUT TERMINAL OF SAID SECOND SIGNAL SUMMING MEANS; A LIMITING AMPLIFIER MEANS HAVING AN INPUT TERMINAL AND AN OUTPUT TERMINAL FOR TRANSMITTING A SIGNAL FROM THE OUTPUT TERMINAL WHICH SWITCHES BETWEEN TWO POLARITIES IN ACCORDANCE WITH THE POLARITY OF THE SIGNAL RECEIVED AT THE INPUT TERMINAL; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID SECOND SIGNAL SUMMING MEANS TO THE INPUT TERMINAL OF SAID LIMITING AMPLIFIER MEANS; A CONTROLLED ATTENUATOR MEANS HAVING AN INPUT TERMINAL, AN OUTPUT TERMINAL AND A CONTROL TERMINAL FOR CONTROLLING THE ATTENUATION OF A SIGNAL RECEIVED AT THE INPUT TERMINAL IN ACCORDANCE WITH A CONTROL SIGNAL RECEIVED AT THE CONTROL
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |