DI

David M. Campbell, II

UN Unknown: 1 patents #213 of 2,616Top 9%
🗺 California: #14,783 of 41,698 inventorsTop 40%
Overall (2011): #325,268 of 364,097Top 90%
1
Patents 2011

Issued Patents 2011

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
8023674 Connector for hearing assistance device having reduced mechanical feedback Daniel R. Schumaier 2011-09-20