US4287601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-programing memory tuning system
Assignee: Philips North America LLC
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Filing: 1979-10-22
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Granted: 1981-09-01
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Expires: 1999-10-22
Abstract
Abstract Apparatus for automatically restoring information concerning a plurality of broadcast station frequencies in a microprocessor type tuning system when such information is inadvertently lost from a volatile memory.
Inventors
- 👤 Arthur N. Borg
- 👤 Jerry D. Trostel
- 👤 Daniel A. Heuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:15
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/0245; H03J5/0254; H03J5/0263
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A broadcast receiver tuning system comprising: memory means simultaneously storing information identifying the frequencies of a plurality of broadcast stations; storage means storing information identifying a predetermined frequency and information identifying an incremental frequency; generating means receiving the information identifying said predetermined frequency and the information identifying the incremental frequency and generating from said received information information identifying the approximate frequencies of each of said plurality of broadcast stations; and conducting means conducting said information identifying said approximate frequencies from said generating means to said memory means.
Claim 2
Dependent Claim
87 words
A broadcast receiver tuning system comprising: memory means simultaneously storing information identifying the frequencies of a plurality of broadcast stations; storage means storing information identifying a predetermined frequency and information identifying an incremental frequency; generating means receiving the information identifying said predetermined frequency and the information identifying the incremental frequency and generating from said received information information identifying the approximate frequencies of each of said plurality of broadcast stations; and conducting means conducting said information identifying said approximate frequencies from said generating means to said memory means.
Claim 3
Dependent Claim
45 words
A broadcast receiver according to claim 1, wherein said broadcast receiver is a television receiver and the plurality of broadcast stations having information identifying their approximate frequencies generated by said generating means includes UHF channels and said generating means generates that information in digital form.
Claim 4
Dependent Claim
23 words
A broadcast receiver according to claim 2, wherein said storage means stores information identifying the frequency of each of the twelve VHF channels.
Claim 5
Dependent Claim
29 words
A broadcast receiver according to claim 3, wherein the information identifying the frequencies of each of the twelve VHF channels is stored in digital form by said storage means.
Claim 6
Dependent Claim
35 words
A broadcast receiver according to claim 4, wherein said memory means stores said information identifying the frequencies of said VHF channels and said information identifying the approximate frequencies of said UHF channels in digital form.
Claim 7
Dependent Claim
17 words
A broadcast receiver according to claim 5, wherein said storage means includes internal registers of a microprocessor.
Claim 8
Dependent Claim
19 words
A broadcast receiver according to claim 6, wherein said generating means includes the arithmetic logic unit of said microprocessor.
Claim 9
Dependent Claim
18 words
A broadcast receiver according to claim 7, wherein said memory means includes an electrically alterable read only memory.
Claim 10
Dependent Claim
16 words
A broadcast receiver according to claim 8, wherein said storage means includes a read only memory.
References Cited (Backward Citations)
US4122395A
Cited
US4093922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |