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










Image Number 4 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
Soybean cultivar CL1013665
Pixel structure of organic light emitting device
Encoding method, decoding method, encoding device, decoding device, program, and recording medium
Nitride semiconductor laser device
Method and system for providing magnetic junctions having improved characteristics
Limit switch
Method and apparatus for communication channel error rate estimation
  Randomly Featured Patents
Battery charging circuit
Method for separating pathogenic or toxic agents from a body fluid and return to body
Non-woven textile
Arrangement for displaying message screens on a telephone terminal
Device for the programmed tracing of designs by particle bombardment
Multiple SNP for diagnosing cardiovascular disease, microarray and kit comprising the same, and method of diagnosing cardiovascular disease using the same
Scooter
Assembly for a game controller attachment
Horizontal pass, multiple packed-bed gas scrubber
Seat belt apparatus of a vehicle