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 Three-stage GaN HEMT doherty power amplifier for high frequency applications Managing consistent interfaces for demand planning business objects across heterogeneous systems Portable electronic device Method and apparatus for implementing cross-talk based booster wires in a system on a field programmable gate array Viscous coolant heater with variable coolant pump drive Identification card Optical reader having improved back-illuminated image sensor   Randomly Featured Patents Alarm device having a pick-up formed as a condenser with piezoelectric dielectric Slouch rear seat system System and method for defining and dynamically invoking polymorphic call flows Apparatus for controlling cooling fan for vehicle Generator for flow rate of pressurized fluid Method for manufacturing sealing tool Heat dissipation plate for battery cell module and battery cell module having the same Three frequency modulated combination thermal neutron lifetime log and porosity Front face of a key plug Combined pill container and reversible lid © 2006-2008 PatentGenius. All Rights Reserved.