Inventor
FREEMAN DAVID H
US8 patents
⚠️ This page may combine multiple inventors who share the name “FREEMAN DAVID H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VIZTEC INC
5 patentsUS6450407B1Sep 17, 2002
Chip card rebate system
VIZTEC INC899 citations98
US6402039B1Jun 11, 2002
Flexible chip card with display
VIZTEC INC323 citations98
US6068183AMay 30, 2000
Chip card system
VIZTEC INC389 citations98
US6019284AFeb 1, 2000
Flexible chip card with display
VIZTEC INC620 citations98
US5931764AAug 3, 1999
Wearable device with flexible display
VIZTEC INC480 citations98