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
Method for forming a semiconductor device using selective epitaxy of group III-nitride
System and method for advertising messages on distributed document processing devices
Illuminating waveguide fabrication method
Dimmable LED light fixture having adjustable color temperature
Pixel circuit
Piezoelectric quasi-resonance linear motors based on acoustic standing waves with combined resonator
Architectural panel with natural fossil spade leaf embossed surface
  Randomly Featured Patents
Apparatus by which auxiliary slide-in units are connected to slide-in units
Electric cranking motor automatic disconnect and lockout circuit
Apparatus and method for putting practice
Rotary internal combustion motor
Adaptive determination of patient specific optimal AV delay during elevated heart rates based on cardiac output measurements
Web-based services for querying and matching likes and dislikes of individuals
Polyaxial bone screw with compound articulation
Semiconductor light-emitting device and method for manufacturing the same
Filling tube and seal construction
Hose clamp with inclined barbs