← Back to Patent Explorer
US3718985A Expired / Lapsed US ⏱️ 0.0 years remaining

Group instruction audio-visual teaching system

Assignee: General Electric Co
•
Filing: 1971-04-01
•
Granted: 1973-03-06
•
Expires: 1991-04-01
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract STRUCTOR THE CORRECT ANSWERS TO THE MULTIPLE-CHOICE QUESTIONS. A PROGRAMMING COMPONENT GENERATES SELF-CLOCKING DIGITAL CONTROL SIGNALS AND RECORDS THEM ON ONE TRACK OF A MAGNETIC TAPE AND RECORDS ANALOG SIGNALS ON ANOTHER TRACK FOR PROVIDING AUDIO INFORMATION TO A GROUP OF STUDENTS. THE TAPE IS THEN UTILIZED IN A RESPONSE COMPONENT WHICH RESPONDS TO THE DIGITAL CONTROL SIGNALS TO PROVIDE AUTOMATIC OPERATIONS SUCH AS REMOTELY OPERATING ONE OR TWO VISUAL DISPLAY DEVICES (I.E., A SLIDE PROJECTOR), AND FOR PRESENTING TO THE STUDENTS OVER A LOUD-SPEAKER, MATERIAL IN LECTURE FORM AND, OR, MULTIPLE-CHOICE QUESTIONS. THE RESPONSE COMPONENT IS OPERATED BY THE INSTRUCTOR AND INCLUDES MULTIPLE LAMPS WHICH DISPLAY TO THE IN-

Inventors

  • 👤 T Hewitt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 01:06
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/07; G09B7/073

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-05 1976-09-04 1977-03-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-05 1980-09-04 1981-03-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-05 1984-09-04 1985-03-06 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag