Patent US3728800A successfully refreshed from Google Patents.
US3728800A
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Educational apparatus
Assignee: Individual
•
Filing: 1971-09-15
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Granted: 1973-04-24
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Expires: 1991-09-15
Abstract
Abstract An educational apparatus comprising a plurality of blocks, each side of which includes a grammatical part of speech and the ends of which are designed to interlock with respective blocks to form a grammatically correct sentence.
Inventors
- 👤 D Magram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:46
CPC Classifications
G; G09; G09B; G09B1/00; G09B1/32; G09B1/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
An education device comprising a plurality of three dimensional blocks adapted to be interlocked together to form at least two grammatically correct word combinations, one of said combinations being in the singular and the other of said combinations being in the plural, each of said blocks including on each of its sides at least one word of the same grammatical classification and having ends adapted for interlocking, one of said ends including at least one projection unique to the grammatical classification associated with said block and said other end including at least one opening unique to said associated classification, said opening having a configuration which receives only a projection which forms a grammatically correct word combination.
Claim 2
Dependent Claim
116 words
An education device comprising a plurality of three dimensional blocks adapted to be interlocked together to form at least two grammatically correct word combinations, one of said combinations being in the singular and the other of said combinations being in the plural, each of said blocks including on each of its sides at least one word of the same grammatical classification and having ends adapted for interlocking, one of said ends including at least one projection unique to the grammatical classification associated with said block and said other end including at least one opening unique to said associated classification, said opening having a configuration which receives only a projection which forms a grammatically correct word combination.
Claim 3
Dependent Claim
44 words
A device as set forth in claim 1 including blocks having on each of its sides at least one word of the same grammatical classification associated with both plural and singular word combinations, said blocks having only one of its ends adapted to interlock.
Claim 4
Dependent Claim
47 words
A device as set forth in claim 1 wherein said projections comprise a plurality of pegs and said openings comprise a plurality of holes for receiving said pegs, each block having a unique number and arrangement of said pegs and holes associated with a grammatical word classification.
Claim 5
Dependent Claim
45 words
A device as set forth in claim 1 wherein the end having said receiving opening includes a second projection and said projection end includes a second opening to receive said second projection to limit the number of interlocking combinations between two grammatically correct block combinations.
Claim 6
Dependent Claim
32 words
A device as set forth in claim 3 wherein said pegs are arranged in a geometrical pattern and said openings include geometrical patterns complementary to the pattern of a grammatically correct block.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |