Assignee
AMERICAN EXPRESS TRS
US·5 granted patents·1,471 citations·filing 1993–1997
Top patents by PatentIndex Score
5 records- 0194US5684291ARefundable prepaid telephone cardAMERICAN EXPRESS TRS·Filed 1995·Granted Nov 4, 1997·205 cites·23 claims
- 0294US5483445AAutomated billing consolidation system and methodAMERICAN EXPRESS TRS·Filed 1993·Granted Jan 9, 1996·794 cites·30 claims
- 0380US5988509ARefundable prepaid telephone cardAMERICAN EXPRESS TRS·Filed 1997·Granted Nov 23, 1999·224 cites·23 claims
- 0478US5923734AMethods and apparatus for providing a prepaid, remote memory transaction account with voice indiciaAMERICAN EXPRESS TRS·Filed 1997·Granted Jul 13, 1999·230 cites·17 claims
- 0537US5422945AFast last digit detection of a dialed telephone numberAMERICAN EXPRESS TRS·Filed 1993·Granted Jun 6, 1995·18 cites·13 claims
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →