US3744154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching device
Assignee: Individual
•
Filing: 1972-02-24
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Granted: 1973-07-10
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Expires: 1992-02-24
Abstract
Abstract A teaching device comprises a first or center segment having a root word inprinted thereon. One or more second end segments are pivotably attached to one end of the first segment and each segment contains a prefix for the root word. One or more third end segments are pivotably attached to the other end of the first segment and each segment contains a suffix for the root word. In use, the device is displayed so that the root word alone or in combination with any one of the prefixes or suffixes is visible. This is accomplished by moving the second and third segments individually into positions wherein the prefix or the suffix or both are properly associated with the root word. When the teaching device is not in use, the second and third segments overlap the first segment and the first segment is folded.
Inventors
- 👤 D Pott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:56
CPC Classifications
G; G09; G09B; G09B17/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
220 words
In a teaching device: a flat first segment having front and rear sides and top, bottom and end edges, said first segment having a root word on the front side thereof disposed between said end edges; a plurality of flat second segments movably associated with one end of said first segment, each of said second segments having front and rear sides and top, bottom and end edges, each of said second segments having one or more letters on the front side thereof disposed between the end edges thereof for meaningful combination with said rOot word to modify its significance, at least one of said plurality of second segments being longer between its end edges than another of said second segments, and hinge means for movably connecting each of said second segments at an end edge thereof to an end edge of said first segment, each of said second segments being movable to one position wherein said letters thereon are not visible to an observer of said root word and being further movable to another position wherein said letters thereon are visible to an observer of the root word and properly and meaningfully associated with said root word, said one of said second segments when in its said other position overlapping and concealing at least one letter of said root word.
Claim 2
Dependent Claim
220 words
In a teaching device: a flat first segment having front and rear sides and top, bottom and end edges, said first segment having a root word on the front side thereof disposed between said end edges; a plurality of flat second segments movably associated with one end of said first segment, each of said second segments having front and rear sides and top, bottom and end edges, each of said second segments having one or more letters on the front side thereof disposed between the end edges thereof for meaningful combination with said rOot word to modify its significance, at least one of said plurality of second segments being longer between its end edges than another of said second segments, and hinge means for movably connecting each of said second segments at an end edge thereof to an end edge of said first segment, each of said second segments being movable to one position wherein said letters thereon are not visible to an observer of said root word and being further movable to another position wherein said letters thereon are visible to an observer of the root word and properly and meaningfully associated with said root word, said one of said second segments when in its said other position overlapping and concealing at least one letter of said root word.
Claim 3
Dependent Claim
33 words
A teaching device according to claim 1 wherein said first segment is fabricated of stiff but foldable material and is provided with a fold line extending between said top and bottom edges thereof.
Claim 4
Dependent Claim
141 words
A teaching device according to claim 1 including at least one flat third segment movably associated with the other end of said first segment, said third segment having front and rear sides and top, bottom and end edges, said third segment having one or more letters on the front side thereof disposed between the end edges thereof for meaningful combination with said root word to modify its significance, and hinge means for movably connecting said third segment at an end edge thereof to the other end edge of said first segment, said third segment being movable to one position wherein said letters thereon are not visible to an observer of said root word and being further movable to another position wherein said letters thereon are visible to an observer of the root word and properly and meaningfully associated with said root.
Claim 5
Dependent Claim
33 words
A teaching device according to claim 3 wherein said first segment is fabricated of stiff but foldable material and is provided with a fold line extending between said top and bottom edges thereof.
Claim 6
Dependent Claim
24 words
A teaching device according to claim 3 including a plurality of said third segments movably associated with said other end of said first segment.
Claim 7
Dependent Claim
33 words
A teaching device according to claim 5 wherein said first segment is fabricated of stiff but foldable material and is provided with a fold line extending between said top and bottom edges thereof.
Claim 8
Dependent Claim
53 words
A teaching device according to claim 5 wherein at least one of said plurality of third segments is longer between its end edges than another of said third segments so as to overlap and conceal at least one letter of said root word when said one third segment is in its other position.
Claim 9
Dependent Claim
33 words
A teaching device according to claim 7 wherein said first segment is fabricated of stiff but foldable material and is provided with a fold line extending between said top and bottom edges thereof.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |