DB

David Butler

EA Elkem Asa: 1 patents #22 of 72Top 35%
📍 Millbrae, CA: #172 of 414 inventorsTop 45%
🗺 California: #149,087 of 386,348 inventorsTop 40%
Overall (All Time): #1,620,178 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6177045 Composition and method for inoculating low sulphur grey iron Christopher Ecob, Douglas White 2001-01-23
5322539 Quartz tank member and method of production thereof Melvin P. Mathisen, Jeffrey F. White 1994-06-21
5120220 Right angled dental hand piece 1992-06-09