EW

Ernest L. Woodfill

3M: 2 patents #5,326 of 11,543Top 50%
📍 Columbia Heights, MN: #48 of 121 inventorsTop 40%
🗺 Minnesota: #23,881 of 52,454 inventorsTop 50%
Overall (All Time): #2,295,119 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5321757 Hearing aid and method for preparing same — 1994-06-14
4827525 Attachment device for a probe microphone David A. Hotvet, Rolf C. Rising 1989-05-02