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:
Jan. 11, 1977
Filed:
Aug. 16, 1973
Jack S Kilby, Dallas, TX (US);
Other;
Abstract
A system for teaching spelling, arithmetic or other drill subject is disclosed which utilizes a magnetic tape to store signals containing both oral questions and digital data representative of the correct answer to the question. A teacher's encoding unit provides means for recording the question on the magnetic tape, and means for encoding and recording on the tape the correct alphabetical or numerical answer to the question. A student's unit includes a playback system for reproducing the signals from the tape and presenting the question to the student. The student then sets the alphabetical or numerical answer into an encoder and a comparator compares the answer encoded by the student with the coded answer stored on the tape. Each of the units features an encoder having twelve character select switches each having 27 positions. A dual indicator system permits the entire alphabet plus the entire numerical system, or a total of 52 characters to be included in the answers.