EH

Edmund R. Helffrich

📍 Allentown, PA: #735 of 1,150 inventorsTop 65%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #4,115,979 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4213008 Loudspeaker enclosure for mid-wall location — 1980-07-15