Patent US2634684A successfully refreshed from Google Patents.
Patent US3215779A successfully refreshed from Google Patents.
US3215779A
Expired / Lapsed
US
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Digital data conversion and transmission system
Assignee: HALLICRAFTERS CO
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Filing: 1961-02-24
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Granted: 1965-11-02
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Expires: 1981-02-24
Abstract
No abstract record available.
Inventors
- 👤 Charles F Halm
- 👤 Mindaugas E Jazbutis
- 👤 James T Kries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4906; H04L25/4908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A DIGITAL DATA HANDLING SYSTEM UTILIZING INFORMATION BITS OF ONE OF TWO CHARACTERS, TRANSMITTING APPARATUS OF THE CHARACTER DESCRIBED, COMPRIING: A SOURCE OF DATA IN DIGITAL FORM OF M-BIT GROUPS, WITH A DIGIT RATE, FM; MEANS CONNECTED TO SAID SOURCE FOR TRANSLATING THE DATA INTO N-BIT GROUPS WITH EACH BIT OF ONE CHARACTER PRECEDED AND FOLLOWED BY A BIT OF THE OTHER CHARACTER, M AND N BEING POSITIVE INTEGERS, AND N BEING GREATER THA M; A SOURCE OF CARRIER; MEANS FOR MODULATING SAID CARRIER WITH SAID N-BIT DATA GROUP, UTILIZING PHASE REVERSAL MODULATION, PHAE REVERSALS BEING EFFECTE DON OCCURRENCE OF BITS OF SAID ONE CHARACTER; AND MEANS FOR TANSMITTING SAID MODULATED CARRIER, SAID TRANSMITTING MEANS INCLUDING A TRANSMISSION CHANNEL HAVING A BANDWIDTH LESS THAN SAID M-BIT DIGIT RATE, FM.
Claim 2
Dependent Claim
130 words
IN A DIGITAL DATA HANDLING SYSTEM UTILIZING INFORMATION BITS OF ONE OF TWO CHARACTERS, TRANSMITTING APPARATUS OF THE CHARACTER DESCRIBED, COMPRIING: A SOURCE OF DATA IN DIGITAL FORM OF M-BIT GROUPS, WITH A DIGIT RATE, FM; MEANS CONNECTED TO SAID SOURCE FOR TRANSLATING THE DATA INTO N-BIT GROUPS WITH EACH BIT OF ONE CHARACTER PRECEDED AND FOLLOWED BY A BIT OF THE OTHER CHARACTER, M AND N BEING POSITIVE INTEGERS, AND N BEING GREATER THA M; A SOURCE OF CARRIER; MEANS FOR MODULATING SAID CARRIER WITH SAID N-BIT DATA GROUP, UTILIZING PHASE REVERSAL MODULATION, PHAE REVERSALS BEING EFFECTE DON OCCURRENCE OF BITS OF SAID ONE CHARACTER; AND MEANS FOR TANSMITTING SAID MODULATED CARRIER, SAID TRANSMITTING MEANS INCLUDING A TRANSMISSION CHANNEL HAVING A BANDWIDTH LESS THAN SAID M-BIT DIGIT RATE, FM.
References Cited (Backward Citations)
US2959351A
Cited
US3032745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |