US3141244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audiovisual teaching device
Assignee: Individual
•
Filing: 1961-11-15
•
Granted: 1964-07-21
•
Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 Karl U Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:26
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/06; G09B3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A TEACHING AND TESTING DEVICE COMPRISING THE COMBINATION OF: POWER OPERATED PRESENTATION MEANS TO PRESENT TEACHING AND QUESTION MATERIAL TO A STUDENT, WHICH OPERATES IN RESPONSE TO CLOSING AND OPENING OF A CIRCUIT; A CONTROL UNIT TO OPERATE SAID MEANS IN RESPONSE TO A SIGNAL RECEIVED BY SAID UNIT AS A RESULT OF CLOSING A CIRCUIT WHICH COMMUNICATES THEREWITH; A SHEET OF PUNCTURABLE, FLEXIBLE, FOLDABLE, NON-CONDUCTIVE MATERIAL HAVING AREAS WHICH CORRESPOND TO CORRECT ANSWERS TO QUESTIONS PROPOUNDED IN SAID MATERIAL PRESENTED BY SAID PRESENTATION MEANS; A SHEET OF NON-CONDUCTIVE MATERIAL HAVING ITS UPPER SURFACE UNDERLYING SAID SHEET OF FLEXIBLE, FOLDABLE MATERIAL, PORTIONS OF SAID UPPER SURFACE WHICH CORRESPOND TO CORRECT ANSWERS BEING COVERED WITH CONDUCTIVE MATERIAL; A PROBE OF RELATIVELY RIGID CONDUCTIVE MATERIAL ADAPTED TO PUNCTURE SAID SHEET OF FLEXIBLE FOLDABLE MATERIAL AND CONTACT SAID CONDUCTIVE MATERIAL; MEANS TO PROVIDE A CLOSED CIRCUIT TO PASS CURRENT FROM SAID CONTROL UNIT THROUGH SAID PROBE AND THROUGH SAID CONDUCTIVE MATERIAL BACK TO SAID CONTROL UNIT WHILE SAID PROBE IS IN CONTACT WITH SAID CONDUCTIVE MATERIAL.
Claim 2
Dependent Claim
173 words
A TEACHING AND TESTING DEVICE COMPRISING THE COMBINATION OF: POWER OPERATED PRESENTATION MEANS TO PRESENT TEACHING AND QUESTION MATERIAL TO A STUDENT, WHICH OPERATES IN RESPONSE TO CLOSING AND OPENING OF A CIRCUIT; A CONTROL UNIT TO OPERATE SAID MEANS IN RESPONSE TO A SIGNAL RECEIVED BY SAID UNIT AS A RESULT OF CLOSING A CIRCUIT WHICH COMMUNICATES THEREWITH; A SHEET OF PUNCTURABLE, FLEXIBLE, FOLDABLE, NON-CONDUCTIVE MATERIAL HAVING AREAS WHICH CORRESPOND TO CORRECT ANSWERS TO QUESTIONS PROPOUNDED IN SAID MATERIAL PRESENTED BY SAID PRESENTATION MEANS; A SHEET OF NON-CONDUCTIVE MATERIAL HAVING ITS UPPER SURFACE UNDERLYING SAID SHEET OF FLEXIBLE, FOLDABLE MATERIAL, PORTIONS OF SAID UPPER SURFACE WHICH CORRESPOND TO CORRECT ANSWERS BEING COVERED WITH CONDUCTIVE MATERIAL; A PROBE OF RELATIVELY RIGID CONDUCTIVE MATERIAL ADAPTED TO PUNCTURE SAID SHEET OF FLEXIBLE FOLDABLE MATERIAL AND CONTACT SAID CONDUCTIVE MATERIAL; MEANS TO PROVIDE A CLOSED CIRCUIT TO PASS CURRENT FROM SAID CONTROL UNIT THROUGH SAID PROBE AND THROUGH SAID CONDUCTIVE MATERIAL BACK TO SAID CONTROL UNIT WHILE SAID PROBE IS IN CONTACT WITH SAID CONDUCTIVE MATERIAL.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |