DL

Donald Joseph Leonard

Chevron: 2 patents #1,772 of 4,788Top 40%
📍 Lagunitas, CA: #2 of 6 inventorsTop 35%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #2,369,637 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4253404 Natural draft combustion zone optimizing method and apparatus — 1981-03-03
4235171 Natural draft combustion zone optimizing method and apparatus — 1980-11-25