US3205294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument
Assignee: Motorola Solutions Inc
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Filing: 1963-01-07
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Granted: 1965-09-07
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Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 Fred B Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:01
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/10; G10H5/12; Y; Y10; Y10S; Y10S84/00; Y10S84/09; Y10S84/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
AN ELECTRONIC MUSICAL INSTRUMENT INCLUDING IN COMBINATION, AT LEAST ONE TRANSISTOR OSCILLATOR CIRCUIT INCLUDING A HIGH-PASS T-FILTER NETWORK AND A LOW-PASS T-FILTER NETWORK TOGETHER FORMING A TWIN-T FEEDBACK NETWORK FOR PRODUCING THE REQUIRED PHASE SHIFT AT A SELECTED AUDIO FREQUENCY TO SUSTAIN OSCILLATIONS, SAID HIGH-PASS T-FILTER NETWORK HAVING A MIDSECTION WITH AN OUTPUT POINT THEREIN AT WHICH A NON-SINUSOIDAL OUTPUT SIGNAL IS DEVELOPED, AND SAID LOW-PASS T-FILTER NETWORK HAVING A MIDSECTION WITH AN OUTPUT POINT THEREIN AT WHICH A SINUSOIDAL OUTPUT SIGNAL IS DEVELOPED SUCH THAT SAID OUTPUT SIGNALS HAVE DIFFERENT TONAL QUALITIES, CONTROL MEANS COUPLED TO SAID OSCILLATOR CIRCUIT FOR CAUSING SAID OSCILLATOR TO GENERATE SAID OUTPUT SIGNALS AT AT LEAST ONE PRE-ESTABLISHED FUNDAMENTAL FREQUENCY, UTILIZATION MEANS INCLUDING A SOUND REPRODUCER, AND A VOICING CONTROL MEANS COUPLED TO SAID OUTPUT POINTS IN SAID T-FILTER NETWORKS AND TO SAID UTILIZATION MEANS FOR SELECTIVELY INTRODUCING SAID OUTPUT SIGNALS OF DIFFERENT HARMONIC CONTENTS FROM SAID OUTPUT CIRCUIT MEANS TO SAID UTILIZATION MEANS.
Claim 2
Dependent Claim
160 words
AN ELECTRONIC MUSICAL INSTRUMENT INCLUDING IN COMBINATION, AT LEAST ONE TRANSISTOR OSCILLATOR CIRCUIT INCLUDING A HIGH-PASS T-FILTER NETWORK AND A LOW-PASS T-FILTER NETWORK TOGETHER FORMING A TWIN-T FEEDBACK NETWORK FOR PRODUCING THE REQUIRED PHASE SHIFT AT A SELECTED AUDIO FREQUENCY TO SUSTAIN OSCILLATIONS, SAID HIGH-PASS T-FILTER NETWORK HAVING A MIDSECTION WITH AN OUTPUT POINT THEREIN AT WHICH A NON-SINUSOIDAL OUTPUT SIGNAL IS DEVELOPED, AND SAID LOW-PASS T-FILTER NETWORK HAVING A MIDSECTION WITH AN OUTPUT POINT THEREIN AT WHICH A SINUSOIDAL OUTPUT SIGNAL IS DEVELOPED SUCH THAT SAID OUTPUT SIGNALS HAVE DIFFERENT TONAL QUALITIES, CONTROL MEANS COUPLED TO SAID OSCILLATOR CIRCUIT FOR CAUSING SAID OSCILLATOR TO GENERATE SAID OUTPUT SIGNALS AT AT LEAST ONE PRE-ESTABLISHED FUNDAMENTAL FREQUENCY, UTILIZATION MEANS INCLUDING A SOUND REPRODUCER, AND A VOICING CONTROL MEANS COUPLED TO SAID OUTPUT POINTS IN SAID T-FILTER NETWORKS AND TO SAID UTILIZATION MEANS FOR SELECTIVELY INTRODUCING SAID OUTPUT SIGNALS OF DIFFERENT HARMONIC CONTENTS FROM SAID OUTPUT CIRCUIT MEANS TO SAID UTILIZATION MEANS.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |