G09B 1 - Manually- or mechanically-operated educational appliances using elements forming or bearing symbols, signs, pictures, or the like which are arranged or adapted to be arranged in one or more particular ways

Patents for G09B 1 - Manually- or mechanically-operated educational appliances using elements forming or bearing symbols, signs, pictures, or the like which are arranged or adapted to be arranged in one or more particular ways (2,411)
02/1977
02/08/1977	US4006541 Tactile learning device
01/1977
01/18/1977	US4003144 Educational block with replaceable chip
12/1976
12/28/1976	US3999310 Arithmetic device
12/07/1976	US3995379 Knitting
12/07/1976	US3995378 Mathematics visual teaching aid
09/1976
09/28/1976	US3982331 Educational board game
09/21/1976	US3981086 Carrel apparatus for use in learning
07/1976
07/20/1976	US3969832 Teaching aid
06/1976
06/22/1976	US3964749 Pentomino puzzles
04/1976
04/27/1976	US3952423 Bible board game
02/1976
02/10/1976	US3936957 Demotic gemstone indicating device