David Trop

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Newark, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
“Calling party pays” cellular and prepaid platforms for cellular ca...
- Patent number 6,871,062
- Issue date Mar 22, 2005
- IDT Corporation
- David Trop
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
System and method for preventing real-time and near real-time fraud...
- Publication number 20040063424
- Publication date Apr 1, 2004
- Eli J. Silberstein
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
"Calling party pays" cellular and prepaid platforms for cellular ca...
- Publication number 20020147002
- Publication date Oct 10, 2002
- David Trop
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Paging system with 'calling party pays' and other advanced features
- Publication number 20020094800
- Publication date Jul 18, 2002
- David Trop
- H04 - ELECTRIC COMMUNICATION TECHNIQUE