US4891011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for assisting the learning of a subject
Assignee: Individual
•
Filing: 1988-07-13
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Granted: 1990-01-02
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Expires: 2008-07-13
Abstract
Abstract A system for assisting the learning of a subject and, more specifically, for the aiding of the teaching of a language. The system comprises a substrate upon which is arranged a first, basic text that contains supplementable information which is unaidedly visible to the eye of a human user. A second, explanatory text, interlinearly arrayed with respect to the first text, provides additional information related to the supplementable information contained in the first text. The second text is arranged so that the additional information is generally proximate to the supplementable information to which it relates. The second text is displayed using a medium which is generally invisible to the eye of a human user unless exposed to light of a specified frequency range, such as ultraviolet (UV) light.
Inventors
- 👤 Graham D. Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:54
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A system for aiding the teaching of a language to a human being comprising a substrate with first and second sides; a first text displayed upon said first side of said substrate, said first text being visible to said human being; a second text also displayed upon said first side of said substrate, said second text being invisible to said human being; and a portable light source for providing light in a nonvisible frequency range in a select, small area on said substrate to render a portion of said second text visible to said human being; said second text being related to said first text; portions of said first text, and of said second text being arrayed in substantially adjacent lines; portions of said second text being selectively visible only where illuminated by said light source.
Claim 2
Independent Claim
136 words
A system for aiding the teaching of a language to a human being comprising a substrate with first and second sides; a first text displayed upon said first side of said substrate, said first text being visible to said human being; a second text also displayed upon said first side of said substrate, said second text being invisible to said human being; and a portable light source for providing light in a nonvisible frequency range in a select, small area on said substrate to render a portion of said second text visible to said human being; said second text being related to said first text; portions of said first text, and of said second text being arrayed in substantially adjacent lines; portions of said second text being selectively visible only where illuminated by said light source.
Claim 3
Independent Claim
126 words
A system for aiding the teaching of a language to a human being comprising a substrate with first and second sides, a first text displayed upon said first side of said substrate; said first text being visible to said human being, a second text also displayed upon said first side of said substrate, said second text being invisible to said human being, portions of which are adapted to be rendered visible in response to light of a specified frequency range, said second text being related to said first text, portions of said first text and of said second text having related meanings being arranged in an alternating interlineal array, said second text being rendered selectively visible only when illuminated by light of said specified frequency range.
Claim 4
Independent Claim
126 words
A system for aiding the teaching of a language to a human being comprising a substrate with first and second sides, a first text displayed upon said first side of said substrate; said first text being visible to said human being, a second text also displayed upon said first side of said substrate, said second text being invisible to said human being, portions of which are adapted to be rendered visible in response to light of a specified frequency range, said second text being related to said first text, portions of said first text and of said second text having related meanings being arranged in an alternating interlineal array, said second text being rendered selectively visible only when illuminated by light of said specified frequency range.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |