Inventor · disambiguated record
Douglas M. Fieldhouse
Also filed as: FIELDHOUSE DOUGLAS M
4 granted patents·2 pending applications·71 citations·filing 1999–2009
76Inventor score
Files withVESTA CORP4
Top patents by PatentIndex Score
6 records- 0173US7242922B2Toll free calling account recharge system and methodVESTA CORP·Filed 2001·Granted Jul 10, 2007·20 cites·8 claims
- 0265US6404866B1Telephone calling account system and methodVESTA CORP·Filed 1999·Granted Jun 11, 2002·48 cites·25 claims
- 0361US7539480B2Toll-free calling account recharge system and methodVESTA CORP·Filed 2007·Granted May 26, 2009·2 cites·24 claims
- 0455US7979051B2Toll free calling account recharge system and methodVESTA CORP·Filed 2009·Granted Jul 12, 2011·1 cites·30 claims
- 0552US2003037000A1System and method for creating a multi-use card having banking and telephone calling accountsFiled 2002·Application pending·0 cites
- 0640US2003048888A1Telephone calling account system and methodFiled 2002·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →