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
TRPM8 antagonists and their use in treatments
Soybean EF1A promoter and its use in constitutive expression of transgenic genes in plants
Catheter with multiple electrode assemblies for use at or near tubular regions of the heart
Methods and apparatus to determine impressions using distributed demographic information
Methods of producing the membranes and the uses of membranes as battery separator films
Conductor for transmitting electrical power
Film, polarizing plate and display device, and method of manufacturing film
  Randomly Featured Patents
Dolly for portable weed cutters
Method for fabricating electrode for lithium secondary battery
Toolbox
Alignment elements for an apparatus for handling printing plates
Housing for a hooded interactive aerial display system
Multi-deck electric outlet assembly
Somatic transfer of modified genes to predict drug effects
Triazole derivative or salt thereof
Method of high temperature laundering using sodium citrate and an anionic
Cooling enhancements in thin films using flexible complex seal due to temperature increase or thermal load increase