Dennis E. J. Johnson — 42 Patents at Spi Lighting

Dennis E. J. Johnson has been granted 42 US patents while listed as an inventor at Spi Lighting. The first was granted in 1981 and the most recent in November 2023. Dennis E. J. Johnson ranks #72,062 of 4,157,543 US inventors in our database (top 1.7%). Patent records list Dennis E. J. Johnson in Grafton, WI, US.

Issued Patents All Time

Showing 1–25 of 42 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
D1004049	Reactor tank	—	2023-11-07
8210898	Pivotally manipulable toy	—	2012-07-03
D653760	Vapor ion plasma generator	—	2012-02-07
7475487	Height recording album	—	2009-01-13
7184991	Pattern recognition applied to oil exploration and production	Robert Wentland, Peter Whitehead, Fredric Young, Jawad Mokhtar, Bradley Clark Wallet	2007-02-27
7160448	Non-chemical water treatment method and apparatus employing ionized air purification technologies	—	2007-01-09
6923901	Non-chemical water treatment method and apparatus employing ionized air purification technologies for marine application	Charles E. Leffler	2005-08-02
6740245	Non-chemical water treatment method and apparatus employing ionized air purification technologies	—	2004-05-25
6494601	Modular cluster lighting fixture	—	2002-12-17
5792369	Apparatus and processes for non-chemical plasma ion disinfection of water	—	1998-08-11
5728303	Electro-coalescence/magnetic separation (ECMS) system and components for removal of contaminants from water streams, including desalinization	—	1998-03-17	$257,000
5685994	Method for water treatment and purification using gas ion plasma source and disinfectant metal ion complexes	—	1997-11-11
5676455	Wall mountable lighting fixture	Dean R. Smith	1997-10-14
D380853	Wall mountable light shade	—	1997-07-08
5635059	Method and apparatus for water treatment and purification using gas ion plasma source and disinfectant metal ion complexes	—	1997-06-03	$200,000
D379548	Wall mountable light shade	—	1997-05-27
5622622	Ultraviolet sterilizer and source of ionized molecules for electrocoalescent/magnetic separation (ECMS) removal of contaminants from water streams	—	1997-04-22	$182,000
5616250	Method for mixing coagulating agents into a contaminated water flow, and for removing contaminants therefrom	Clifford F. Frith	1997-04-01	$113,000
5597479	Electro-coalescence/magnetic separation (ECMS) system and components for removal of contaminants from water streams, including desalinization	—	1997-01-28	$172,000
5443719	System and reactor for mixing coagulating agents into a contaminated water flow, and for removing contaminants therefrom	Clifford F. Frith	1995-08-22	$456,000
D357091	Bracket for a suspended lighting fixture system	Scott P. Malmsten	1995-04-04
D352566	Suspended lighting fixture	Scott P. Malmsten	1994-11-15
D351482	Light module for suspended lighting fixture unit	Scott P. Malmsten	1994-10-11
D350409	Lighting fixture mountable on an overhead support	Scott P. Malmsten	1994-09-06
D349779	Lighting fixture mountable on an overhead support	Scott P. Malmsten	1994-08-16

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Dennis E. J. Johnson — 42 Patents

Issued Patents All Time

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