Wing K. Cheung

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Voorburg, NL

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Patents Grantslast 30 patents

Information Patent Grant
System and method for increasing a value of an electronic payment c...
- Patent number 6,062,472
- Issue date May 16, 2000
- Koninklijke PTT Nederland N.V.
- Wing Keung Cheung
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Processor circuit comprising a first processor, a memory and a peri...
- Patent number 5,574,929
- Issue date Nov 12, 1996
- Koninklijke PTT Nederland N.V.
- Rob Pieterse
- G06 - COMPUTING CALCULATING COUNTING