Howard H. Ferrell — 2 Patents at Conoco

Howard H. Ferrell has been granted 2 US patents while listed as an inventor at Conoco. The first was granted in 1980 and the most recent in May 1989. Howard H. Ferrell ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Howard H. Ferrell in Ponca City, OK, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
4833915	Method and apparatus for detecting formation hydrocarbons in mud returns, and the like	Frederick J. Radd	1989-05-30
4212748	Polymer flood filtration improvement	Dell Conley, Burton M. Casad, Olaf M. Stokke	1980-07-15	$31,464,000

Howard H. Ferrell — 2 Patents

Issued Patents All Time

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