DH

Donald D. Helman

📍 Buena Park, CA: #153 of 296 inventorsTop 55%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #4,069,979 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4330572 Method for repair of thin glass coatings Robert A. Administrator of the National Aeronautics and Space Frosch, Jack W. Holt, Laurence W. Smiser 1982-05-18