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David R. Walker — 28 Patents

DRDx Resources: 5 patents #1 of 1Top 100%

TMThe Mead: 4 patents #213 of 1,100Top 20%

EAE.I. Du Pont De Nemours And: 2 patents #5,664 of 12,129Top 50%

Nortel Networks Limited: 1 patents #2,518 of 5,294Top 50%

RDRf Micro Devices: 1 patents #192 of 325Top 60%

University Of Texas System: 1 patents #2,951 of 6,559Top 45%

ZLZbd Displays Limited: 1 patents #6 of 16Top 40%

FIFilmtec: 1 patents #7 of 17Top 45%

Clearwater, FL: #15 of 932 inventorsTop 2%

Florida: #1,466 of 67,251 inventorsTop 3%

Overall (All Time): #134,628 of 4,157,543Top 4%

28 Patents All Time

David R. Walker has been granted 28 US patents while listed as an inventor at Dx Resources. The first was granted in 1988 and the most recent in June 2021. David R. Walker ranks #134,628 of 4,157,543 US inventors in our database (top 3.2%). Patent records list David R. Walker in Clearwater, FL, US.

Patents per Year

Issued Patents All Time

Showing 1–25 of 28 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
11046925	System and process for producing biogas from an ethanol slurry mix	—	2021-06-29
9446326	Method and apparatus for ethanol production	—	2016-09-20
9034429	Method for patterning a surface using selective adhesion	Guy Peter Bryan-Brown, John Clifford Jones	2015-05-19
8674714	System and method for probing work pieces	Anton Kitai, Paul Andrew Labelle, Robert Glenn Parker	2014-03-18
D699141	RFID tag	—	2014-02-11
7746179	Method and apparatus for selecting a frequency generating element	Nathaniel King, Jr., Robert A. Koupal	2010-06-29	$2,905,000
7179382	Coated activated carbon for automotive emission control	Laurence H. Hiltzik, Edward D. Tolles	2007-02-20	$22,611,000
6696384	Method of making shaped activated carbon	Peter D. McCrae, Tiejun Zhang	2004-02-24	$13,099,000
6573212	Method of making shaped activated carbon	Peter D. McCrae, Tiejun Zhang	2003-06-03	$21,336,000
6556744	Reduction of dispersion effects in optical transmission fibre systems	Robert K. Brimacombe	2003-04-29	$22,971,000
6472343	Shaped activated carbon	Peter D. McCrae, Tiejun Zhang	2002-10-29	$36,392,000
6457348	High pressure steam line target inserter	—	2002-10-01
6136077	Steam absorption apparatus	—	2000-10-24
6106673	Method for separating components of a fermentation process byproduct containing oil bound with fibers	—	2000-08-22
5520780	Method and apparatus for de-inking newsprint using counterflow extractor	—	1996-05-28
5476550	Method and apparatus for extracting soluble and dispersible materials from products using a slotted scroll extractor	—	1995-12-19
5409541	Method and apparatus for extracting soluble and dispersible materials from products using a slotted scroll extractor	—	1995-04-25
5326538	Closed sterilization system for treating a product such as toxic or infectious waste	—	1994-07-05
5285581	Method for drying waste materials	—	1994-02-15
5262056	Polyamides and polypyrrolones for fluid separation membranes	William J. Koros	1993-11-16
5137545	Vapor clarification system and method	—	1992-08-11
5114684	In-line electromagnetic energy wave applicator	—	1992-05-19
5080581	Method and apparatus for drying waste materials	—	1992-01-14
5054405	High temperature turbulent gasification unit and method	—	1991-10-08
5052313	Waste treatment system and method	—	1991-10-01