DO

Douglas W. O'Brien

EG Essex Group: 1 patents #77 of 141Top 55%
📍 Rocky River, OH: #160 of 263 inventorsTop 65%
🗺 Ohio: #42,657 of 73,341 inventorsTop 60%
Overall (All Time): #4,107,546 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4191865 Loudspeaker padring and method of making the same John A. King 1980-03-04