SJ

Stephen D. Julstrom

ER Etymotic Research: 1 patents #6 of 17Top 40%
📍 Chicago, IL: #173 of 643 inventorsTop 30%
🗺 Illinois: #1,480 of 5,663 inventorsTop 30%
Overall (2004): #111,264 of 270,089Top 45%
1
Patents 2004

Issued Patents 2004

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6694034 Transmission detection and switch system for hearing improvement applications Elmer V. Carlson, Norman P. Matzen, Robert B. Schulein, Willem Soede 2004-02-17