US3737566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television coder and decoder
Assignee: Lockheed Martin Corp
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Filing: 1970-12-08
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Granted: 1973-06-05
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Expires: 1990-12-08
Abstract
Abstract Apparatus is herein disclosed for use in conjunction with television receivers for presenting coded messages displayed on a television screen and for decoding same by the selection of a particular displayed coded symbol. The coder comprises means for flashing symbols on the television screen an odd or even number of times. The decoder comprises a multivibrator responsive to said coded symbol.
Inventors
- 👤 R Baer
- 👤 W Rusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:33
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; A; A63; A63F; A63F13/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
Television apparatus, comprising: a television receiver for receiving coded information from a television signal source which transmits a predetermined code comprising a series of signals correlated with the raster scan containing serially odd and even numbers of pulses with means at said receiver for utilizing said signals to display at least a first spot flashing an even number of times and a second spot flashing an odd number of times and means for decoding said displayed information.
Claim 2
Dependent Claim
77 words
Television apparatus, comprising: a television receiver for receiving coded information from a television signal source which transmits a predetermined code comprising a series of signals correlated with the raster scan containing serially odd and even numbers of pulses with means at said receiver for utilizing said signals to display at least a first spot flashing an even number of times and a second spot flashing an odd number of times and means for decoding said displayed information.
Claim 3
Dependent Claim
21 words
Television apparatus as defined in claim 1, wherein said first spot flashes n times and said second spot flashes n+1 times.
Claim 4
Dependent Claim
17 words
Television apparatus as defined in claim 1, wherein said decoding means includes a single light sensitive detector.
Claim 5
Dependent Claim
22 words
Television apparatus as defined in claim 3, wherein said decoding means further includes a bistable device coupled to said light sensitive detector.
Claim 6
Dependent Claim
24 words
Television apparatus as defined in claim 4, wherein said decoding means further includes means for initially setting said bistable device to a first state.
Claim 7
Dependent Claim
24 words
Television apparatus as defined in claim 5, wherein said decoding means further includes means responsive to the number of flashes of said flashing spots.
Claim 8
Dependent Claim
21 words
Television apparatus as defined in claim 6, wherein said means responsive includes means responsive to the state of said bistable device.
Claim 9
Dependent Claim
17 words
Television apparatus as defined in claim 1, wherein said decoding means includes only one light sensitive detector.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |