Resources Contact Us Home
Educational and amusement apparatus

Image Number 2 for United States Patent #4428732.

An educational and amusement device includes elements in the form of an alphabet and/or the digits of a numbering system. Each character element is similarly divided by a plurality of essentially similar parallel lines, which may consist of a first set of parallel lines alone or first and second sets, with the second set of parallel lines oriented to extend in an opposite and perpendicular direction from such first set of lines. Each element includes at least three parts but less than ten, and preferably is four or five parts for sufficient complexity to maintain interest of a child or other person having a learning disability but of a sufficient simplicity to prevent frustration. Each element may be formed with the parts releasably interconnected with each other as by water soluble adhesive. Each element can be made progressively more complex.

  Recently Added Patents
High-density fiber optic modules and module housings and related equipment
Systems and methods for controlling phasing of advancing substrates in absorbent article converting lines
Coated article and method for making the same
Probe for ultrasound diagnostic apparatus
Synthesized interoperable communications
Radio frequency power delivery system
Machine shop including computer system that interfaces with different legacy servers
  Randomly Featured Patents
Method for fabricating polycrystalline silicon having micro roughness on the surface
Imaging lens and imaging apparatus using imaging lens
Rose plant 74-1489-2
Tree resistant insulation compositions
Method and apparatus for detecting concentration gradients
Electrodeless fluorescent lamp with spread induction coil
Hardware-efficient implementation of dynamic element matching in sigma-delta DAC's
Actuator for a portable electronic device
Zero level setting circuit for A/D converter in a magnetic disk drive
Location marker