HJ

Harry W. Sigworth, Jr.

Chevron: 3 patents #33 of 236Top 15%
📍 Orinda, CA: #2 of 25 inventorsTop 8%
🗺 California: #141 of 6,198 inventorsTop 3%
Overall (1982): #4,885 of 81,411Top 7%
3
Patents 1982

Issued Patents 1982

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4346731 Buoyant element check valve for a thermosiphon energy system — 1982-08-31
4314667 Thermal expansion check valve — 1982-02-09
4312687 Solar collector headers — 1982-01-26