DG

Donald J. Gray

📍 Lynnfield, MA: #2 of 16 inventorsTop 15%
🗺 Massachusetts: #422 of 4,501 inventorsTop 10%
Overall (1997): #42,025 of 185,788Top 25%
2
Patents 1997

Issued Patents 1997

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5702535 Dry cleaning and degreasing system Peter Gebhard 1997-12-30
5630434 Filter regeneration system Peter Gebhard 1997-05-20