Electronic teaching unit

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Description

FIG. 1 is an isometric view of an electronic teaching unit embodying my new design, taken from above and behind the unit;

FIG. 2 is an isometric view thereof taken from above and in front of the unit; and

FIG. 3 is a bottom view thereof.

Referenced Cited
U.S. Patent Documents
D213003 December 1968 Sellers
D237608 November 1975 Dean et al.
D247441 March 7, 1978 Kroll
Patent History
Patent number: D261776
Type: Grant
Filed: Jun 15, 1979
Date of Patent: Nov 10, 1981
Assignee: Enrichment Reading Corporation of Amerca (Iron Ridge, WI)
Inventor: David W. Wendt (Madison, WI)
Primary Examiner: Melvin B. Feifer
Law Firm: Isaksen, Lathrop, Esch, Hart & Clark
Application Number: 6/48,727
Classifications
Current U.S. Class: Sensory Feedback, E.g., Audio-visual Teaching Machine (D19/60); With Keyboard (D18/7)
International Classification: D1908;