US3193775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable attenuation equalizer
Assignee: LENKURT ELECTRIC CO OF CANADA
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Filing: 1962-04-19
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Granted: 1965-07-06
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Herrero Jose Luis
- 👤 Willoner Gideon
- 👤 Weeks Robert Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:31
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/02; H03G5/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN EQUALIZER CIRCUIT IN COMBINATION COMPRISING: AN INPUT CIRCUIT AND OUTPUT CIRCUIT; CIRCUIT CONNECTIONS FOR CONNECTING SIGNALS TO SAID INPUT; AN IMPEDANCE ISOLATING CIRCUIT CONNECTED TO SAID INPUT; A COMPENSATING CIRCUIT INTERPOSED BETWEEN SAID ISOLATING CIRCUIT AND SAID OUTPUT CIRCUIT FOR ADJUSTING THE AMPLITUDE SIGNAL LEVEL FOR A PARTICULAR RANGE OF FREQUENCIES IN ACCORDANCE WITH THE FREQUENCY RESPONSE OF SAID COMPENSATING CIRCUIT; SAID IMPEDANCE ISOLATING CIRCUIT INCLUDING AN IMPEDANCE MEANS CONNECTED TO SAID COMPENSATING CIRCUIT FOR VARYING THE FREQUENCY RANGE AND SELECTIVITY OF SAID COMPENSATING CIRCUIT; AND AMPLITUDE VARYING MEANS CONNECTED BETWEEN SAID COMPENSATING MEANS AND SAID OUTPUT, WHEREBY THE AMPLITUDE OF SAID RANGE OF FREQUENCIES MAY BE VARIED WITHOUT AFFECTING THE AMPLITUDE OF SIGNALS OUTSIDE OF SAID RANGE.
Claim 2
Dependent Claim
119 words
AN EQUALIZER CIRCUIT IN COMBINATION COMPRISING: AN INPUT CIRCUIT AND OUTPUT CIRCUIT; CIRCUIT CONNECTIONS FOR CONNECTING SIGNALS TO SAID INPUT; AN IMPEDANCE ISOLATING CIRCUIT CONNECTED TO SAID INPUT; A COMPENSATING CIRCUIT INTERPOSED BETWEEN SAID ISOLATING CIRCUIT AND SAID OUTPUT CIRCUIT FOR ADJUSTING THE AMPLITUDE SIGNAL LEVEL FOR A PARTICULAR RANGE OF FREQUENCIES IN ACCORDANCE WITH THE FREQUENCY RESPONSE OF SAID COMPENSATING CIRCUIT; SAID IMPEDANCE ISOLATING CIRCUIT INCLUDING AN IMPEDANCE MEANS CONNECTED TO SAID COMPENSATING CIRCUIT FOR VARYING THE FREQUENCY RANGE AND SELECTIVITY OF SAID COMPENSATING CIRCUIT; AND AMPLITUDE VARYING MEANS CONNECTED BETWEEN SAID COMPENSATING MEANS AND SAID OUTPUT, WHEREBY THE AMPLITUDE OF SAID RANGE OF FREQUENCIES MAY BE VARIED WITHOUT AFFECTING THE AMPLITUDE OF SIGNALS OUTSIDE OF SAID RANGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |