Patent US3133358A successfully refreshed from Google Patents.
US3133358A
Expired / Lapsed
US
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Teaching aid
Assignee: Individual
•
Filing: 1962-10-01
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Granted: 1964-05-19
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Schramm Chris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:32
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A TEACHING AID COMPRISING A HOUSING HAVING WINDOWS THEREIN WITH MATHEMATICAL SYMBOLS BETWEEN SUCH WINDOWS, A PLURALITY OF WHEELS MOUNTED ROTATABLY IN THE HOUSING, SUCH WHEELS EACH HAVING MATHEMATICAL INTEGERS THEREON VISIBLE THROUGH ONE OF THE WINDOWS, A PLURALITY OF GROUPS OF ACTUATING OPENINGS IN THE HOUSING, A PLURALITY OF ACTUATING PEGS, EACH INSERTABLE IN ANY ONE OF THE OPENINGS, ACTUATING MECHANISMS POSITIONED IN THE HOUSING BELOW EACH OF THE ACTUATING OPENINGS AND COUPLED OPERATIVELY TO THE WHEELS WHEREBY PEGS INSERTED IN THE OPENINGS WILL CONTACT THE ACTUATING MECHANISMS AND ROTATE THE WHEELS.
Claim 2
Dependent Claim
93 words
A TEACHING AID COMPRISING A HOUSING HAVING WINDOWS THEREIN WITH MATHEMATICAL SYMBOLS BETWEEN SUCH WINDOWS, A PLURALITY OF WHEELS MOUNTED ROTATABLY IN THE HOUSING, SUCH WHEELS EACH HAVING MATHEMATICAL INTEGERS THEREON VISIBLE THROUGH ONE OF THE WINDOWS, A PLURALITY OF GROUPS OF ACTUATING OPENINGS IN THE HOUSING, A PLURALITY OF ACTUATING PEGS, EACH INSERTABLE IN ANY ONE OF THE OPENINGS, ACTUATING MECHANISMS POSITIONED IN THE HOUSING BELOW EACH OF THE ACTUATING OPENINGS AND COUPLED OPERATIVELY TO THE WHEELS WHEREBY PEGS INSERTED IN THE OPENINGS WILL CONTACT THE ACTUATING MECHANISMS AND ROTATE THE WHEELS.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |