US3342941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-channel carrier transmission system
Assignee: Toyo Tsushinki KK
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Filing: 1963-06-18
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Granted: 1967-09-19
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Expires: 1983-06-18
Abstract
No abstract record available.
Inventors
- 👤 Kondo Kiyomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:32
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A MULTI-CHANNEL CARRIER COMMUNICATION SYSTEM COMPRISING A TRANSMISSION SIDE HAVING A PLURALITY OF CHANNELS IN A SELECTED TRANSMISSION FREQUENCY BAND, AND COMPRISING PREMODULATION MEANS FOR UNIFORMLY CONVERTING THE VOICE FREQUENCY SIGNAL COMPONENTS OF AL OF THE CHANNELS TO THE SAME HIGH FREQUENCY OF AT LEAST ABOUT SIX TIMES THE MAXIMUM FREQUENCY OF THE TRANSMISSION FREQUENCY BAND, MEANS FOR CHANNEL-MODULATING SIGNAL COMPONENTS BY CARRIER FREQUENCIES WHICH ARE DIFFERENT FOR EACH CHANNEL, MEANS INCLUDING LOW PASS FILTERS WHICH ARE THE SAME FOR ALL CHANNELS FOR SELECTING THE LOWER SIDE BAND COMPONENTS OF SAID MODULATED SIGNALS AND COMBINING THEM SO AS TO BE ALLOCATED SUCCESSIVELY IN THE TRANSMISSION FREQUENCY BAND IN PREDETERMINED ORDER; AND A RECEIVING SIDE COMPRISING MEANS FOR PERFORMING FUNCTIONS OF THE TRANSMISSION SIDE IN REVERSE ORDER.
Claim 2
Dependent Claim
126 words
A MULTI-CHANNEL CARRIER COMMUNICATION SYSTEM COMPRISING A TRANSMISSION SIDE HAVING A PLURALITY OF CHANNELS IN A SELECTED TRANSMISSION FREQUENCY BAND, AND COMPRISING PREMODULATION MEANS FOR UNIFORMLY CONVERTING THE VOICE FREQUENCY SIGNAL COMPONENTS OF AL OF THE CHANNELS TO THE SAME HIGH FREQUENCY OF AT LEAST ABOUT SIX TIMES THE MAXIMUM FREQUENCY OF THE TRANSMISSION FREQUENCY BAND, MEANS FOR CHANNEL-MODULATING SIGNAL COMPONENTS BY CARRIER FREQUENCIES WHICH ARE DIFFERENT FOR EACH CHANNEL, MEANS INCLUDING LOW PASS FILTERS WHICH ARE THE SAME FOR ALL CHANNELS FOR SELECTING THE LOWER SIDE BAND COMPONENTS OF SAID MODULATED SIGNALS AND COMBINING THEM SO AS TO BE ALLOCATED SUCCESSIVELY IN THE TRANSMISSION FREQUENCY BAND IN PREDETERMINED ORDER; AND A RECEIVING SIDE COMPRISING MEANS FOR PERFORMING FUNCTIONS OF THE TRANSMISSION SIDE IN REVERSE ORDER.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |