DH

David A. Hilderbrand

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Los Angeles, CA: #4,824 of 12,377 inventorsTop 40%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #2,291,828 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5282636 Novelty game Melvin J. Wyman 1994-02-01
D334950 Popcorn vending machine Melvin J. Wyman 1993-04-20