Language Patents (Class 434/156)
- Magnet included in teaching means (Class 434/168)
- Electrical component included in teaching means (Class 434/169)
- Color used in teaching means (Class 434/170)
- Letter or word bearing elements (e.g., cards, blocks, etc.) with interfitting surface configurations (Class 434/171)
- Letter-bearing elements (e.g., cards, blocks, etc.) selectively aligned to form word or sentence (Class 434/172)
- Display of word or picture upon correct manipulation of teaching means (Class 434/176)
- Crossword puzzle aid (Class 434/177)
- Reading (Class 434/178)