Darrell Johnson — 6 Patents at Valenite

Darrell Johnson has been granted 6 US patents while listed as an inventor at Valenite. The first was granted in 1993 and the most recent in October 2007. Darrell Johnson ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Darrell Johnson in White Bear Lake, MN, US.

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7278497	Method for extracting coal bed methane with source fluid injection	Jim Terry, Tom Bailey, Adrian Vuyk, Jr., Alejandro Coy, Ron Divine	2007-10-09	$167,159,000
6114847	Connectionless signal detection device for conductive cables	—	2000-09-05
5733582	Apparatus for support of large shipping containers during foaming	—	1998-03-31
5713133	Methods of preparing cemented metal carbide substrates for deposition of adherent diamond coatings and products made therefrom	Deepak G. Bhat, Stephen L. Bennett	1998-02-03
5560839	Methods of preparing cemented metal carbide substrates for deposition of adherent diamond coatings and products made therefrom	Stephen L. Bennett, Deepak G. Bhat	1996-10-01
D341601	Machine for foaming refrigerator cavities	—	1993-11-23

Darrell Johnson — 6 Patents

Issued Patents All Time

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