Thomas D. Sandbrook — 2 Patents at Conoco

Thomas D. Sandbrook has been granted 2 US patents while listed as an inventor at Conoco. The first was granted in 1985 and the most recent in January 1989. Thomas D. Sandbrook ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Thomas D. Sandbrook in Eighty Four, PA, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4797559	Method and apparatus for controlling a flotation cell	Hayward B. Oblad, Michael G. Nelson	1989-01-10	$27,192,000
4552651	Control of froth cell performance through the use of differential bubbler tubes	Roy O. Scandrol	1985-11-12

Thomas D. Sandbrook — 2 Patents

Issued Patents All Time

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