HJ

Harry W. Sigworth, Jr.

Chevron: 5 patents #897 of 4,788Top 20%
📍 Orinda, CA: #175 of 531 inventorsTop 35%
🗺 California: #106,790 of 386,348 inventorsTop 30%
Overall (All Time): #1,066,566 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
4413615 Passive solar energy water preheat system using non-freezing heat transport mediums 1983-11-08
4409959 Solar energy water preheat system 1983-10-18
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