Patent US3095654A successfully refreshed from Google Patents.
US3095654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device
Assignee: International Business Machines Corp
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Filing: 1961-09-14
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Granted: 1963-07-02
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Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Cummings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:43
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
AN EDUCATIONAL DEVICE COMPRISING A SCREEN; A PROJECTOR FOR DISPLAYING ON SAID SCREEN DATA COMPRISING A QUESTION, A PLURALITY OF ANSWERS, AND A CORRESPONDING GROUP OF INSTRUCTIONS; A PLURALITY OF SLIDES EACH CARRYING A RELATED GROUPING OF SAID DATA; A MOUNT FOR EACH SLIDE; A MOTOR DRIVEN SLIDE CHANGER ADAPTED TO HOLD AND FEED SAID MOUNTS SERIATIM. SAID CHANGER FEEDING AN INDIVIDUAL MOUNT INTO A DISPLAY POSITION; MEANS FOR MASKING THAT PORTION OF SAID SLIDE CONTAINING SAID INSTRUCTIONS WHEN IN DISPLAY POSITION; A "YES" CIRCUIT CONTROLLING SAID SLIDE CHANGER MOTOR AND A "NO" CIRCUIT CONTROLLING SAID MASKING
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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |