Assignee

MARSHALL DAVID A

US·1 granted patent·1 pending application·7 citations·filing 1992–2005

Technology mixB32B1 F25D1 G06Q1 G07B1 G07C1 G07F1

Top patents by PatentIndex Score

2 records

0146US2006157563A1Smart card systems in connection with transportation servicesMARSHALL DAVID A·Filed 2005·Application pending·0 cites
0229US5277941ASystem to insulate and retain cold temperatureMARSHALL DAVID A·Filed 1992·Granted Jan 11, 1994·7 cites·1 claims

Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →