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
Computer program and apparatus for evaluating signal propagation delays
Media processing method and device
Utilizing virtually stored media snapshots for rasterizing print jobs
Optical multiplexer/demultiplexer
Canine iPS cells and method of producing same
Manufacturing process for cellular screening substratum, resultant substratum, and method and apparatus for screening
Bi-directional, compact, multi-path and free space channel replicator
  Randomly Featured Patents
Stand for supporting a musical instrument
Magnetic mass-lift impulsive seismic energy source including attracting and repulsing electromagnets
Water-based coating composition containing polyvinyl chloride
Adjustable arc rotor-type sprinkler with selectable uni-directional full circle nozzle rotation
Thin-film magnetic head and method of manufacturing same
Portable data storage device
Method and apparatus for knitting patterned sliver high pile fabric
Ratio ruler for comparative judgments
Wide blade scraper
Camping unit for pick-up trucks, vans, boats and the like