US3403343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Harmonic generator
Assignee: AT&T Inc
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Filing: 1966-02-17
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Granted: 1968-09-24
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Expires: 1986-02-17
Abstract
No abstract record available.
Inventors
- 👤 James M Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:51
CPC Classifications
H; H03; H03B; H03B21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
APPARATUS WHICH COMPRISES MEANS FOR STORING 2N SAMPLES OF ONE CYCLE OF A REFERENCE SINE WAVE WHERE N IN A SELECTED POSITIVE INTEGER; MEANS FOR GENERATING A SIGNAL WITH A FREQUENCY 2N TIMES A SELECTED FUNDAMENTAL FREQUENCY F(T); MEANS DRIVEN BY SAID SIGNAL FOR SEQUENTIALLY READING OUT OF SAID STORING MEANS EVERY ITH STORED SAMPLE AT A FREQUENCY OF 2NF CYCLES PER SECOND, WHERE I IS AN INTEGER GIVEN BY 1<-I<-N; AND MEANS FOR CONVERTING THE ITH SEQUENCE OF SAMPLES INTO THE ITH HARMONIC OF SAID SELECTED FUNDAMENTAL FREQUENCY F(T).
Claim 2
Dependent Claim
90 words
APPARATUS WHICH COMPRISES MEANS FOR STORING 2N SAMPLES OF ONE CYCLE OF A REFERENCE SINE WAVE WHERE N IN A SELECTED POSITIVE INTEGER; MEANS FOR GENERATING A SIGNAL WITH A FREQUENCY 2N TIMES A SELECTED FUNDAMENTAL FREQUENCY F(T); MEANS DRIVEN BY SAID SIGNAL FOR SEQUENTIALLY READING OUT OF SAID STORING MEANS EVERY ITH STORED SAMPLE AT A FREQUENCY OF 2NF CYCLES PER SECOND, WHERE I IS AN INTEGER GIVEN BY 1<-I<-N; AND MEANS FOR CONVERTING THE ITH SEQUENCE OF SAMPLES INTO THE ITH HARMONIC OF SAID SELECTED FUNDAMENTAL FREQUENCY F(T).
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) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |