Douglas Hunter Powell

Person

Eldorado Hills, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Dual durometer flexible joint for a suspension link
- Patent number 9,995,358
- Issue date Jun 12, 2018
- Douglas H. Powell
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Grow light matrix system incorporating blade lighting system
- Patent number 9,995,446
- Issue date Jun 12, 2018
- Douglas H. Powell
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Flexible joint for a suspension link with a threaded insert
- Patent number 9,694,637
- Issue date Jul 4, 2017
- Douglas H. Powell
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Lock and load control arm
- Patent number 9,174,504
- Issue date Nov 3, 2015
- Douglas Hunter Powell
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Shutoff valve in backflow prevention device
- Patent number 8,887,756
- Issue date Nov 18, 2014
- Douglas Hunter Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Check valve in backflow prevention device
- Patent number 8,875,733
- Issue date Nov 4, 2014
- Douglas Hunter Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Access cover in backflow prevention device
- Patent number 8,844,562
- Issue date Sep 30, 2014
- Douglas Hunter Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Long travel shock absorber
- Patent number 8,714,321
- Issue date May 6, 2014
- Douglas Hunter Powell
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Backflow prevention apparatus
- Patent number 6,443,181
- Issue date Sep 3, 2002
- Hunter Innovations, Inc.
- Douglas H. Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Image comparison apparatus and method
- Patent number 6,424,332
- Issue date Jul 23, 2002
- Hunter Innovations, Inc.
- Douglas H. Powell
- G02 - OPTICS
Information Patent Grant
Backflow prevention apparatus
- Patent number 6,220,282
- Issue date Apr 24, 2001
- Hunter Innovations, Inc.
- Douglas H. Powell
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Backflow prevention apparatus
- Patent number 6,155,291
- Issue date Dec 5, 2000
- Hunter Innovations
- Douglas H. Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Combination diaphragm and groove coupler seal for automatic control...
- Patent number 6,079,692
- Issue date Jun 27, 2000
- Hunter Innovations
- Douglas H. Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Interchangeable automatic control valve
- Patent number 5,701,927
- Issue date Dec 30, 1997
- Hunter Innovations
- Louis J. Hansen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Check valve assembly and method for mounting and installing check v...
- Patent number 5,584,315
- Issue date Dec 17, 1996
- Ames Company, Inc.
- Douglas H. Powell
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Differential loading fluid check valve
- Patent number 5,046,525
- Issue date Sep 10, 1991
- Ames Company, Inc.
- Douglas H. Powell
- E03 - WATER SUPPLY SEWERAGE

Patents Applicationslast 30 patents

Information Patent Application
DUAL DUROMETER FLEXIBLE JOINT FOR A SUSPENSION LINK
- Publication number 20170225530
- Publication date Aug 10, 2017
- Douglas H. Powell
- B60 - VEHICLES IN GENERAL
Information Patent Application
SHUTOFF VALVE IN BACKFLOW PREVENTION DEVICE
- Publication number 20170108130
- Publication date Apr 20, 2017
- Douglas H. Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
GROW LIGHT MATRIX SYSTEM
- Publication number 20170027109
- Publication date Feb 2, 2017
- Douglas H. Powell
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Application
GROW LIGHT MATRIX SYSTEM USING DAISY CHAINS
- Publication number 20170030565
- Publication date Feb 2, 2017
- Douglas H. Powell
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Application
GROW LIGHT MATRIX SYSTEM USING SPACERS TO MAINTAIN PROPER LIGHT POS...
- Publication number 20170030560
- Publication date Feb 2, 2017
- Douglas H. Powell
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Application
GROW LIGHT MATRIX SYSTEM INCORPORATING BLADE LIGHTING SYSTEM
- Publication number 20170030537
- Publication date Feb 2, 2017
- Douglas H. Powell
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Application
SHUTOFF VALVE IN BACKFLOW PREVENTION DEVICE WITH VISUAL INDICATOR
- Publication number 20160238145
- Publication date Aug 18, 2016
- Douglas H. Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
FLEXIBLE JOINT FOR A SUSPENSION LINK WITH A THREADED INSERT
- Publication number 20160238061
- Publication date Aug 18, 2016
- Douglas H. Powell
- B60 - VEHICLES IN GENERAL
Information Patent Application
ADJUSTABLE SHEAR KEY
- Publication number 20160061249
- Publication date Mar 3, 2016
- Douglas H. Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
SHUTOFF VALVE IN BACKFLOW PREVENTION DEVICE
- Publication number 20140150893
- Publication date Jun 5, 2014
- Douglas Hunter Powell
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
CHECK VALVE IN BACKFLOW PREVENTION DEVICE
- Publication number 20140150904
- Publication date Jun 5, 2014
- Douglas Hunter Powell
- E03 - WATER SUPPLY SEWERAGE
Information Patent Application
ACCESS COVER IN BACKFLOW PREVENTION DEVICE
- Publication number 20140150892
- Publication date Jun 5, 2014
- Douglas Hunter Powell
- E03 - WATER SUPPLY SEWERAGE
Information Patent Application
FLEXIBLE JOINT
- Publication number 20130199332
- Publication date Aug 8, 2013
- Douglas H. Powell
- B60 - VEHICLES IN GENERAL
Information Patent Application
LONG TRAVEL SHOCK ABSORBER
- Publication number 20120306133
- Publication date Dec 6, 2012
- Douglas Hunter Powell
- B60 - VEHICLES IN GENERAL
Information Patent Application
Key operational valve
- Publication number 20050045847
- Publication date Mar 3, 2005
- Douglas H. Powell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Douglas Hunter Powell

Person

Patents Grantslast 30 patents

Dual durometer flexible joint for a suspension link

Grow light matrix system incorporating blade lighting system

Flexible joint for a suspension link with a threaded insert

Lock and load control arm

Shutoff valve in backflow prevention device

Check valve in backflow prevention device

Access cover in backflow prevention device

Long travel shock absorber

Backflow prevention apparatus

Image comparison apparatus and method

Backflow prevention apparatus

Backflow prevention apparatus

Combination diaphragm and groove coupler seal for automatic control...

Interchangeable automatic control valve

Check valve assembly and method for mounting and installing check v...

Differential loading fluid check valve

Patents Applicationslast 30 patents

DUAL DUROMETER FLEXIBLE JOINT FOR A SUSPENSION LINK

SHUTOFF VALVE IN BACKFLOW PREVENTION DEVICE

GROW LIGHT MATRIX SYSTEM

GROW LIGHT MATRIX SYSTEM USING DAISY CHAINS

GROW LIGHT MATRIX SYSTEM USING SPACERS TO MAINTAIN PROPER LIGHT POS...

GROW LIGHT MATRIX SYSTEM INCORPORATING BLADE LIGHTING SYSTEM

SHUTOFF VALVE IN BACKFLOW PREVENTION DEVICE WITH VISUAL INDICATOR

FLEXIBLE JOINT FOR A SUSPENSION LINK WITH A THREADED INSERT

ADJUSTABLE SHEAR KEY

SHUTOFF VALVE IN BACKFLOW PREVENTION DEVICE

CHECK VALVE IN BACKFLOW PREVENTION DEVICE

ACCESS COVER IN BACKFLOW PREVENTION DEVICE

FLEXIBLE JOINT

LONG TRAVEL SHOCK ABSORBER

Key operational valve