US4135314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-recorded magnetic audio tape for study
Assignee: Individual
•
Filing: 1977-09-27
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Granted: 1979-01-23
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Expires: 1997-09-27
Abstract
Abstract A magnetic audio tape comprising at least two tracks in one direction of advance of the tape is applied for recording with sounds of a sentence for study. The sentence has at least two blank parts each of which can constitute a question for an expected answer, wherein one track of the tape is recorded with the sound of the sentence except for the one blank part of the sentence and the other track of the tape is recorded with the sound of the sentence except for the other blank part of the sentence. The same sound of the sentence recorded on all of the tracks coincides with each other to be reproduced as a single sound when these tracks are scaned at the same time by magnetic head or heads of a tape recorder.
Inventors
- 👤 Takeshi Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:56
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A pre-recorded magnetic audio tape comprising at least two tracks in one direction of advance of the tape and adapted to use with a tape recorder which can reproduce recorded sound in one track and the other track selectively or simultaneously, said tape being applied for recording with sound of a sentence for study which has at least two blank parts each constituting a question for an expected answer, wherein one track of said tape is recorded with the sound of said sentence except for said one blank part of said sentence and the other track of said tape is recorded with the sound of said sentence except for the other blank part of said sentence, the same sound of said sentence recorded on all of the tracks coinciding with each other to be reproduced as a single sound when these tracks are scaned at the same time by magnetic reproducing head or heads of the tape recorder.
Claim 2
Dependent Claim
158 words
A pre-recorded magnetic audio tape comprising at least two tracks in one direction of advance of the tape and adapted to use with a tape recorder which can reproduce recorded sound in one track and the other track selectively or simultaneously, said tape being applied for recording with sound of a sentence for study which has at least two blank parts each constituting a question for an expected answer, wherein one track of said tape is recorded with the sound of said sentence except for said one blank part of said sentence and the other track of said tape is recorded with the sound of said sentence except for the other blank part of said sentence, the same sound of said sentence recorded on all of the tracks coinciding with each other to be reproduced as a single sound when these tracks are scaned at the same time by magnetic reproducing head or heads of the tape recorder.
Claim 3
Dependent Claim
51 words
A magnetic audio tape as claimed in claim 1, wherein tape sections at said two blank parts of the sentence are recorded with guide sound extraneous to the sound of said sentence, said guide sounds being adapted to notify a user of this tape of the place of said expected answers.
Claim 4
Dependent Claim
27 words
A magnetic audio tape as claimed in claim 1, wherein said sentence adapted for recording on said tape is a sentence for the study of foreign language.
Claim 5
Dependent Claim
27 words
A magnetic audio tape as claimed in claim 1, wherein said sentence adapted for recording on said tape is a sentence for the study of school subjects.
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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |