US4196311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binary-coded message communication
Assignee: Code A Phone Corp
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Filing: 1978-06-07
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Granted: 1980-04-01
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Expires: 1998-06-07
Abstract
Abstract Binary-coded message communication for accessing, over a telephone line, a unit such as a telephone-answering device. Communication takes place through the use of time-space-assigned bursts of two different audio frequencies. One frequency is used in a single burst to define the beginning of a message, and the other frequency is used in one or more bursts to define a selected binary-code--the code being determined in accordance with the time-locations of such burst(s).
Inventors
- 👤 El Don L. Hoven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:03
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65; H04M1/652
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
Apparatus for communicating a selected binary-coded message comprising a marker signal generator for producing recurrent time-spaced marker signals each in the form of a time-controlled burst of one audio frequency, means operatively connected to said marker-signal generator for defining, in each of the time-spans between successive marker signals, a predetermined plurality of successive code-signal-receptive time slots, and a code-signal generator operatively connected to said marker-signal generator and to said defining means for placing, in each such plurality of time slots, a selected pattern of code signals, with each code signal occupying a different time slot and taking the form of a time-controlled burst of another audio frequency, and with the arrangement of presences and absences of code signals in each such plurality of time slots forming the selected binary-coded meassage.
Claim 2
Dependent Claim
130 words
Apparatus for communicating a selected binary-coded message comprising a marker signal generator for producing recurrent time-spaced marker signals each in the form of a time-controlled burst of one audio frequency, means operatively connected to said marker-signal generator for defining, in each of the time-spans between successive marker signals, a predetermined plurality of successive code-signal-receptive time slots, and a code-signal generator operatively connected to said marker-signal generator and to said defining means for placing, in each such plurality of time slots, a selected pattern of code signals, with each code signal occupying a different time slot and taking the form of a time-controlled burst of another audio frequency, and with the arrangement of presences and absences of code signals in each such plurality of time slots forming the selected binary-coded meassage.
Claim 3
Independent Claim
106 words
A method for communicating a selected binary-coded audio message comprising producing recurrent time-spaced marker signals with each marker signal taking the form of a time-controlled burst of one audio frequency, defining, in each of the time spans between successive marker signals, a predetermined plurality of successive code-signal-receptive time slots, and placing, in each such plurality of time slots, a selected pattern of code signals in the form of time-controlled bursts of another audio frequency, with each code signal occupying a different time slot, and with the arrangement of presences and absences of code signals in each such plurality of time slots forming the selected binary-coded message.
Claim 4
Independent Claim
106 words
A method for communicating a selected binary-coded audio message comprising producing recurrent time-spaced marker signals with each marker signal taking the form of a time-controlled burst of one audio frequency, defining, in each of the time spans between successive marker signals, a predetermined plurality of successive code-signal-receptive time slots, and placing, in each such plurality of time slots, a selected pattern of code signals in the form of time-controlled bursts of another audio frequency, with each code signal occupying a different time slot, and with the arrangement of presences and absences of code signals in each such plurality of time slots forming the selected binary-coded message.
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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |