DF

Douglas M. Fieldhouse

VE Vesta: 4 patents #1 of 15Top 7%
📍 Lake Oswego, OR: #273 of 769 inventorsTop 40%
🗺 Oregon: #8,503 of 28,073 inventorsTop 35%
Overall (All Time): #1,239,129 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
7979051 Toll free calling account recharge system and method Kingsley R. Wick 2011-07-12
7539480 Toll-free calling account recharge system and method Kingsley R. Wick 2009-05-26
7242922 Toll free calling account recharge system and method Kingsley R. Wick 2007-07-10
6404866 Telephone calling account system and method Eric Hopper, Keith E. Steele 2002-06-11