Patent US3288904A successfully refreshed from Google Patents.
US3288904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone frequency control system for electronic musical instruments
Assignee: Hammond Organ Co
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Filing: 1962-09-25
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Granted: 1966-11-29
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Expires: 1982-09-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas J George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:24
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; Y; Y10; Y10S; Y10S84/00; Y10S84/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN ELECTRONIC MUSICAL INSTRUMENT COMPRISING A VARIABLE FREQUENCY TONE GENERATOR HAVING A CONTROL TERMINAL, A KEYBOARD, AND MEANS FOR APPLYING SIGNALS TO THE CONTROL TERMINAL TO CHANGE THE FREQUENCY OF OPERATION OF THE GENERATOR IN RESPONSE TO THE MANIPULATION OF THE KEYBOARD, SAID SIGNAL APPLYING MEANS INCLUDING UNILATERALLY CONDUCTIVE MEANS FOR DECREASING THE FREQUENCY IN DISCRETE INTERVALS AND MEANS FOR IMPARTING A PORTAMENTO EFFECT TO INCREASES IN THE FREQUENCY OF OPERATION OF THE GENERATOR.
Claim 2
Dependent Claim
74 words
AN ELECTRONIC MUSICAL INSTRUMENT COMPRISING A VARIABLE FREQUENCY TONE GENERATOR HAVING A CONTROL TERMINAL, A KEYBOARD, AND MEANS FOR APPLYING SIGNALS TO THE CONTROL TERMINAL TO CHANGE THE FREQUENCY OF OPERATION OF THE GENERATOR IN RESPONSE TO THE MANIPULATION OF THE KEYBOARD, SAID SIGNAL APPLYING MEANS INCLUDING UNILATERALLY CONDUCTIVE MEANS FOR DECREASING THE FREQUENCY IN DISCRETE INTERVALS AND MEANS FOR IMPARTING A PORTAMENTO EFFECT TO INCREASES IN THE FREQUENCY OF OPERATION OF THE GENERATOR.
References Cited (Backward Citations)
US2563477A
Cited
US2544017A
Cited
US2255287A
Cited
US2274199A
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US2540478A
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US2499576A
Cited
US2720133A
Cited
US2918576A
Cited
US3049959A
Cited
US3048719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |