Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Tamperproof reusable bingo card










Image Number 2 for United States Patent #4483538.

A translucent intermediate sheet having a standard array of bingo numbers is sandwiched between transparent top and bottom sheets. Alterations to the card, such as by a cheater, to permit changing, adding or rearranging bingo numbers can be seen through the sheets.








 
 
  Recently Added Patents
Process for preparing soybean curd using micronized solution of soybean curd
Communication system
Methods for enhancing tantalum filament life in hot wire chemical vapor deposition processes
Traffic flow analysis mitigation using a cover signal
Polar nematic compounds
Image forming apparatus and control method therefor
Negative electrode material for non-aqueous electrolyte secondary battery, method for manufacturing negative electrode material for non-aqueous electrolyte secondary battery, non-aqueous elect
  Randomly Featured Patents
Counting circuit
Fast search views over business objects
Method of self servicing an appliance
Rosen type piezoelectric transformer with multiple output electrodes, and stabilizer for multiple light source using that
Device for cutting threads in circular stocking knitting machines
Method for determining allocation of tape drive resources for a secure data erase process
Process for the production of polyurethane foams
Inorganic and organic composition for treatment of bone lesions
Tocopherols, tocotrienols, other chroman and side chain derivatives and uses thereof
Apparatus for washing, rinsing and spin drying paint rollers