US3222456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnostic audiometer
Assignee: Individual
•
Filing: 1962-07-12
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Granted: 1965-12-07
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Expires: 1982-07-12
Abstract
No abstract record available.
Inventors
- 👤 Hyman Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:06
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN AUDIOMETER CIRCUIT FOR SCREENING AND DIAGNOSTIC USE COMPRISING PHASE-SHIFT OSCILLATOR MEANS INCLUDING A PLURALITY OF FREQUENCY DETERMINING NETWORKS, FREQUENCY MASKING GENERATOR MEANS, AUDIO TRANSFORMER MEANS CONNECTED TO SAID OSCILLATOR MEANS, STEP ATTENUATING RESISTIVE NETWORK MEANS SELECTIVELY CONNECTED TO SAID AUDIO TRANSFORMER MEANS, A PLURALITY OF TRANSDUCERS SELECTIVELY CONNECTED TO SAID ATTENUATION MEANS, SELECTIVE AND INTERRUPTING SWITCH MEANS CONNECTING SAID MASKING MEANS TO SAID SELECTED TRANSDUCER MEANS TO MULLIFY THE OSCILLATOR SIGNAL
Claim 2
Dependent Claim
72 words
AN AUDIOMETER CIRCUIT FOR SCREENING AND DIAGNOSTIC USE COMPRISING PHASE-SHIFT OSCILLATOR MEANS INCLUDING A PLURALITY OF FREQUENCY DETERMINING NETWORKS, FREQUENCY MASKING GENERATOR MEANS, AUDIO TRANSFORMER MEANS CONNECTED TO SAID OSCILLATOR MEANS, STEP ATTENUATING RESISTIVE NETWORK MEANS SELECTIVELY CONNECTED TO SAID AUDIO TRANSFORMER MEANS, A PLURALITY OF TRANSDUCERS SELECTIVELY CONNECTED TO SAID ATTENUATION MEANS, SELECTIVE AND INTERRUPTING SWITCH MEANS CONNECTING SAID MASKING MEANS TO SAID SELECTED TRANSDUCER MEANS TO MULLIFY THE OSCILLATOR SIGNAL
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |