US3184716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guarded tone signalling
Assignee: Bendix Corp
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Filing: 1961-04-20
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Granted: 1965-05-18
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Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 Jr William B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:51
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/444; H04Q1/45; H04Q1/453
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A CODE COMMUNICATION SYSTEM COMPRISING MEANS FOR SIMULTANEOUSLY TRANSMITTING A GROUP OF DISTINCT FREQUENCIES, CHARACTER TRANSMISSION MEANS FOR TERMINATING DURING A CHARACTER INTERVALS TRANSMISSION A PREDETERMINED COMBINATIONS OF SAID FREQUENCIES CORRESPONDING TO THE RESPECTIVE CODE REPRESENTATION OF EACH OF SAID CHARACTERS, MEANS FOR RECEIVING ALL FREQUENCIES OF SAID GROUP, NORMALLY UNRESPONSIVE MEANS FOR REGISTERING SAID CHARACTERS IN ACCORDANCE WITH SAID COMBINATIONS, AND MEANS RESPONSIVE TO THE TERMINATION OF RECEPTION OF ONE OR MORE BUT LESS THAN ALL OF THE FREQUENCIES OF SAID GROUP FOR CASING SAID NORMALLY UNRESPONSIVE MEANS TO REGISTER SAID COMBINATIONS FOR A PREDETERMINED TIME INTERVAL WITHIN SAID CHARACTER INTERVAL.
Claim 2
Dependent Claim
102 words
A CODE COMMUNICATION SYSTEM COMPRISING MEANS FOR SIMULTANEOUSLY TRANSMITTING A GROUP OF DISTINCT FREQUENCIES, CHARACTER TRANSMISSION MEANS FOR TERMINATING DURING A CHARACTER INTERVALS TRANSMISSION A PREDETERMINED COMBINATIONS OF SAID FREQUENCIES CORRESPONDING TO THE RESPECTIVE CODE REPRESENTATION OF EACH OF SAID CHARACTERS, MEANS FOR RECEIVING ALL FREQUENCIES OF SAID GROUP, NORMALLY UNRESPONSIVE MEANS FOR REGISTERING SAID CHARACTERS IN ACCORDANCE WITH SAID COMBINATIONS, AND MEANS RESPONSIVE TO THE TERMINATION OF RECEPTION OF ONE OR MORE BUT LESS THAN ALL OF THE FREQUENCIES OF SAID GROUP FOR CASING SAID NORMALLY UNRESPONSIVE MEANS TO REGISTER SAID COMBINATIONS FOR A PREDETERMINED TIME INTERVAL WITHIN SAID CHARACTER INTERVAL.
References Cited (Backward Citations)
US2470145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |