David Callum Johnson — 12 Patents at Unknown

David Callum Johnson has been granted 12 US patents while listed as an inventor at Unknown. The first was granted in 1980 and the most recent in November 2025. David Callum Johnson ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list David Callum Johnson in Bristol, IL, GB.

Patents per Year

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Showing 1–12 of 12 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12464970	Work vehicle guidance and/or automation with respect to identified regions of interest in a work area	Matthew Hansen, Ajit K. Thankappan Pillai, Michael A. Torzewski	2025-11-11
9796638	Carbon article having an improved primer coating and an improved anti-oxidant coating	Craig Edwards, Andrew Sketchley	2017-10-24
9771992	Braking	—	2017-09-26
8420412	Method of forming a photovoltaic cell module	Steven D. Crofoot, Kevin Houle, Barry Ketola	2013-04-16	$35,203,000
7938236	Composite article	—	2011-05-10
7892522	Contrast agents	Jonny Østensen, Morten Eriksen, Audun Tornes, Sigmund Frigstad, Harald Dugstad +4 more	2011-02-22	$31,851,000
7153543	Refractory-carbon composite brake friction elements	—	2006-12-26
6660355	Wear resistant articles	—	2003-12-09
5858376	HSV proteins for inhibiting recognition by cytotoxic T lymphocytes	Ian Andrew York	1999-01-12
5750398	Vector, element and method for inhibiting immune recognition	Ian Andrew York	1998-05-12
5634535	Composite brake disc	Thomas G. Fennell, Ronald Fisher, Lynda M. Perks	1997-06-03
4222820	Paper sizing agents	Ian R. Hiskens, Michael J. Caudwell	1980-09-16	$23,419,000

David Callum Johnson — 12 Patents

Patents per Year

Issued Patents All Time

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