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David F. May
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Columbus, IN, US
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Patents Grants
last 30 patents
Information
Patent Grant
Method of operating a compression ignition internal combustion engine
Patent number
8,590,505
Issue date
Nov 26, 2013
Dow Global Technologies LLC
Brandon M. Simmons
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Grant
Exhaust aftertreatment system and method for an internal combustion...
Patent number
6,820,417
Issue date
Nov 23, 2004
Analytical Engineering, Inc.
David F. May
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Grant
Method and apparatus to determine flow rate with the introduction o...
Patent number
6,668,663
Issue date
Dec 30, 2003
Analytical Engineering, Inc.
David F. May
G01 - MEASURING TESTING
Information
Patent Grant
Centrifugal filter utilizing a partial vacuum condition to effect r...
Patent number
6,579,218
Issue date
Jun 17, 2003
Analytical Engineering, Inc.
David F. May
B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...
Information
Patent Grant
Centrifugal filter for removing soot from engine oil
Patent number
6,517,475
Issue date
Feb 11, 2003
Baldwin Filters, Inc.
Gene W. Brown
B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...
Information
Patent Grant
Bone conduction speaker and microphone
Patent number
6,463,157
Issue date
Oct 8, 2002
Analytical Engineering, Inc.
David F. May
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Motor driven centrifugal filter
Patent number
6,213,929
Issue date
Apr 10, 2001
Analytical Engineering, Inc.
David F. May
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Turbine driven centrifugal filter
Patent number
6,210,311
Issue date
Apr 3, 2001
Analytical Engineering, Inc.
David F. May
B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...
Information
Patent Grant
Underwater audio communication system using bone conducted sound
Patent number
5,889,730
Issue date
Mar 30, 1999
Trigger Scuba, Inc.
David F. May
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information
Patent Grant
Scuba diving voice and communication system using bone conducted sound
Patent number
5,706,251
Issue date
Jan 6, 1998
Trigger Scuba, Inc.
David F. May
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Scuba diving voice and communication system using bone conducted sound
Patent number
5,579,284
Issue date
Nov 26, 1996
David F. May
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
METHOD OF OPERATING A SPARK IGNITION INTERNAL COMBUSTION ENGINE
Publication number
20110209683
Publication date
Sep 1, 2011
Brandon M. Simmons
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information
Patent Application
METHOD OF OPERATING A COMPRESSION IGNITION INTERNAL COMBUSTION ENGINE
Publication number
20110088656
Publication date
Apr 21, 2011
Dow Global Technologies, Inc.
Brandon M. Simmons
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information
Patent Application
Exhaust aftertreatment system and method for an internal combustion...
Publication number
20030115860
Publication date
Jun 26, 2003
David F. May
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Gaseous mass flow measurement device
Publication number
20020108451
Publication date
Aug 15, 2002
David F. May
G01 - MEASURING TESTING
Information
Patent Application
Motor driven centrifugal filter
Publication number
20010012814
Publication date
Aug 9, 2001
David F. May
B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...