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Joel J. Spero

📍 Annapolis, MD: #10 of 32 inventorsTop 35%
🗺 Maryland: #369 of 1,889 inventorsTop 20%
Overall (1997): #125,922 of 185,788Top 70%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5690720 Aromatic air circulation and filtration system — 1997-11-25