Michel Marco Paul Drupsteen

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Alkmaar, NL

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Patents Grantslast 30 patents

Information Patent Grant
Integrated circuit card, secure application module, system comprisi...
- Patent number 6,249,869
- Issue date Jun 19, 2001
- Koninklijke KTN N.V.
- Michel Marco Paul Drupsteen
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and system for storing tickets on smart cards
- Patent number 6,119,945
- Issue date Sep 19, 2000
- Koninklijke KPN N.V.
- Frank Muller
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method of securely loading commands in a smart card
- Patent number 6,073,238
- Issue date Jun 6, 2000
- Koninklijke PTT Nederland N.V.
- Michel Marco Paul Drupsteen
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Multiple tickets on smart cards
- Patent number 6,003,776
- Issue date Dec 21, 1999
- Koninklijke KPN N.V.
- Michel Marco Paul Drupsteen
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method of securely modifying data on a smart card
- Patent number 5,856,659
- Issue date Jan 5, 1999
- Koninklijke PTT Nederland N.V.
- Michel Marco Paul Drupsteen
- G06 - COMPUTING CALCULATING COUNTING