Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Bath
Parallel active optical cable
Method and system for parallelizing data copy in a distributed file system
Co-crystals of agomelatine, a process for there preparation and pharmaceutical compositions containing them
Supporting multiple channels of a single interface
Comb
Produce container and lid assembly
  Randomly Featured Patents
Simulated strap hinge
Toy with lightable eyes
Method for realizing a nanometric circuit architecture between standard electronic components and semiconductor device obtained with said method
Benzamide and sulfonamide substituted aminoguanidines and alkoxyguanidines as protease inhibitors
Multi-purpose educational device
Programmable power supply
Method for plasticizing a composition comprised of cellulose fiber and a cellulose ester
Battery with container compartment and end wall stiffening block
Printer and control method of printer
Systems and methods for creating programmable reply functions for an instant messaging client