Inventor
LEDUC MICHEL
FR22 patents
⚠️ This page may combine multiple inventors who share the name “LEDUC MICHEL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
EUROP RECH ELECTR LAB
8 patentsUS5563948AOct 8, 1996
Process for authentication of smart cards, and device for use of the process
EUROP RECH ELECTR LAB104 citations97
US5208856AMay 4, 1993
Scrambling and unscrambling method for composite video signals and implementing device
EUROP RECH ELECTR LAB60 citations94
US5434397AJul 18, 1995
Protection against the non-authorized inhibition of writing in certain storage areas of a smart card
EUROP RECH ELECTR LAB20 citations92
US5173589ADec 22, 1992
Process for instantaneous confirmation of actions in relation to television programs and device for use of the process
EUROP RECH ELECTR LAB62 citations92
US5162638ANov 10, 1992
Process for protection against fraudulent use of smart cards, and device for use of the process
EUROP RECH ELECTR LAB45 citations92
US5199067AMar 30, 1993
Process for promotion of pay television broadcasts, and device for use of the process
EUROP RECH ELECTR LAB4 citations58
US5204898AApr 20, 1993
Method of protection against the unauthorized unscrambling of scrambled television broadcasts, and implementation method
EUROP RECH ELECTR LAB1 citations52
US5210608AMay 11, 1993
Method for the correction of television signals at transmission, and implementation device
EUROP RECH ELECTR LAB0 citations41
GEMPLUS CARD INT
4 patentsUS7409044B2Aug 5, 2008
Emergency call system and device
GEMPLUS CARD INT78 citations97
US6794727B2Sep 21, 2004
Single receiving side contactless electronic module continuous manufacturing process
GEMPLUS CARD INT30 citations92
US5539188AJul 23, 1996
System for the identification of containers, notably gas cylinders
GEMPLUS CARD INT47 citations91
US5969333AOct 19, 1999
Data collection system for card readers
GEMPLUS CARD INT42 citations87