The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1976
Filed:
Feb. 18, 1975
Applicant:
Inventor:
Lewis D Eigen, New York, NY (US);
Assignee:
Meredith Corporation, Des Moines, IA (US);
Primary Examiner:
Int. Cl.
CPC ...
G09B / ;
U.S. Cl.
CPC ...
35 / ;
Abstract
A device for teaching includes a work sheet having a number of sets of response regions. Each response region is comprised of at least one answer area and at least one confirmation area. Invisibly printed answers are generally provided within the confirmation areas. By omitting the answers from selected confirmation areas, it is possible to determine whether a student is making his response in the answer area before seeking a confirmation of the correctness of this answer by making the answer in the confirmation area visible.