US3276151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational apparatus
Assignee: Milton Bradley Co
•
Filing: 1964-04-02
•
Granted: 1966-10-04
•
Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Luke J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:41
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
AN EDUCATIONAL DEVICE FOR PRESENTING FUNDAMENTAL CONCEPTS OF MATHEMATICS COMPRISING, A BASE, A PLURALITY OF EQUALLY SPACED AXIALLY ALIGNED RECESSES IN SAID BASE, A PLURALITY OF NUMBER TABS EACH HAVING A DEPENDING TAIL PORTION ADAPTED FOR ENGAGEMENT IN ONE OF SAID RECESSES, EACH OF SAID NUMBER TABS BEARING NUMERICAL INDICIA THEREON, A GRADUATED NUMBERLESS SCALE ON SAID BASE SPACED FROM SAID RECESSES AND SAID NUMBER TABS AND EXTENDING IN PARALLEL RELATION THERETO, SAID SCALE HAVING MAJOR GRADUATIONS CORRESPONDING TO THE SPACING BETWEEN SAID NUMBER TABS, A HOLDING STRIP SPACED FROM SAID SCALE AND EXTENDING IN PARALLEL RELATION THERETO, A PLURALITY OF COLORED MEMBERS OF VARIOUS SIZES, COLOR AND SHAPES EACH HAVING MEANS FOR RELEASABLY INTERLOCKING WITH SAID HOLDING STRIP, SAID MEMBER WHEN DISPOSED ON SAID HOLDING STRIP IN VETICAL ALIGNMENT WITH SAID NUMBER TABS SHOWING A RELATIONSHIP BETWEEN THE COLORED MEMBERS, THE MAJOR GRADUATIONS ON SAID SCALE AND THE NUMERICAL INDICIA ON SAID NUMBER TABS.
Claim 2
Dependent Claim
155 words
AN EDUCATIONAL DEVICE FOR PRESENTING FUNDAMENTAL CONCEPTS OF MATHEMATICS COMPRISING, A BASE, A PLURALITY OF EQUALLY SPACED AXIALLY ALIGNED RECESSES IN SAID BASE, A PLURALITY OF NUMBER TABS EACH HAVING A DEPENDING TAIL PORTION ADAPTED FOR ENGAGEMENT IN ONE OF SAID RECESSES, EACH OF SAID NUMBER TABS BEARING NUMERICAL INDICIA THEREON, A GRADUATED NUMBERLESS SCALE ON SAID BASE SPACED FROM SAID RECESSES AND SAID NUMBER TABS AND EXTENDING IN PARALLEL RELATION THERETO, SAID SCALE HAVING MAJOR GRADUATIONS CORRESPONDING TO THE SPACING BETWEEN SAID NUMBER TABS, A HOLDING STRIP SPACED FROM SAID SCALE AND EXTENDING IN PARALLEL RELATION THERETO, A PLURALITY OF COLORED MEMBERS OF VARIOUS SIZES, COLOR AND SHAPES EACH HAVING MEANS FOR RELEASABLY INTERLOCKING WITH SAID HOLDING STRIP, SAID MEMBER WHEN DISPOSED ON SAID HOLDING STRIP IN VETICAL ALIGNMENT WITH SAID NUMBER TABS SHOWING A RELATIONSHIP BETWEEN THE COLORED MEMBERS, THE MAJOR GRADUATIONS ON SAID SCALE AND THE NUMERICAL INDICIA ON SAID NUMBER TABS.
References Cited (Backward Citations)
US533216A
Cited
US1405063A
Cited
US2369804A
Cited
US2389394A
Cited
US2554408A
Cited
US2635360A
Cited
US2722754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |