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Class Information
Number: 434/348
Name: Education and demonstration > Question or problem eliciting response > Correctness of response indicated to examine by self-operating or examinee actuated means > Correct answer hidden until examinee moves element
Description: Subject matter wherein the correct answer is revealed after the examinee moves some element.

Sub-classes under this class:

Class Number Class Name Patents
434/349 Means for receiving examinee's written response 12

Patents under this class:

Patent Number Title Of Patent Date Issued
7516180 System and method for providing instructor services using a plurality of client workstations connected to a central control station Apr. 7, 2009
7438555 Teaching aid Oct. 21, 2008
7429045 Method and device for playing a game in which values of game pieces are gradually revealed Sep. 30, 2008
7318052 Knowledge transfer evaluation Jan. 8, 2008
6879805 Test form having a removable opaque layer, and method and apparatus for printing on the form Apr. 12, 2005
6652286 Teaching device Nov. 25, 2003
6210171 Method and apparatus for multiple choice testing system with immediate feedback for correctness of response Apr. 3, 2001
6053741 Flash card holder and learning method Apr. 25, 2000
5895050 Question and answer game Apr. 20, 1999
5820382 Multifilication quizzer Oct. 13, 1998
5797601 User selective solution system and method for flashcards, puzzles, and the like Aug. 25, 1998
5701696 Card holder Dec. 30, 1997
5618180 Method of teaching using a computer Apr. 8, 1997
5447439 Interactive story book using stickers and a method of teaching Sep. 5, 1995
5403014 Game and method of play Apr. 4, 1995
5334021 Masking apparatus for use in authoring, formatting and presenting information to be learned or memorized Aug. 2, 1994
5288075 Image recognition game apparatus Feb. 22, 1994
5281146 Educational device and method Jan. 25, 1994
5243173 Machine readable form and method Sep. 7, 1993
5161978 Method for authoring, formating and presenting information to be learned or memorized Nov. 10, 1992
5160267 Programmed learning device Nov. 3, 1992
5087043 Interactive audio-visual puzzle Feb. 11, 1992
5056793 Picture identification game Oct. 15, 1991
4964642 Variably scored skill game Oct. 23, 1990
4770638 Educational aid having an answer concealing element Sep. 13, 1988
4731027 Educational teaching toy Mar. 15, 1988
4693694 Toy with moving screen Sep. 15, 1987
4678188 Question and answer game structure particularly for use in a restaurant or the like Jul. 7, 1987
4674433 Correct answer displaying device for arithmetic practicing unit Jun. 23, 1987
4657248 Question-and-answer game Apr. 14, 1987
4634385 Teaching wheels Jan. 6, 1987
4573928 Teaching toy Mar. 4, 1986
4561658 Math matching game Dec. 31, 1985
4544360 Book reference list Oct. 1, 1985
4487418 Educational game device Dec. 11, 1984
4445867 Educational board game May. 1, 1984
4377383 Teaching apparatus with system for repetitive review of information Mar. 22, 1983
4349346 Method of making slide calculator Sep. 14, 1982
4311469 Display board for educational exercises Jan. 19, 1982
4262432 Study device Apr. 21, 1981
4258477 Multiplication study device Mar. 31, 1981
4194301 Device for use in paired associate learning Mar. 25, 1980
4021940 Educational device May. 10, 1977
3930673 Lottery ticket Jan. 6, 1976

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