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Douglas Johnston
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Huntsville, AL, US
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Patents Grants
last 30 patents
Information
Patent Grant
Liquid metering distributor for agricultural chemicals
Patent number
5,312,045
Issue date
May 17, 1994
John Blue Company
Douglas Johnston
G05 - CONTROLLING REGULATING
Information
Patent Grant
Method and apparatus for the jet injection of agricultural liquids...
Patent number
4,624,193
Issue date
Nov 25, 1986
John Blue Company
Douglas Johnston
A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information
Patent Grant
Boomless, sprayer for field application for agricultural liquids
Patent number
4,519,542
Issue date
May 28, 1985
John Blue Company, a Division of Burnley Corporation
Douglas Johnston
A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information
Patent Grant
Method and means of presetting the output rate of a centrifugal pum...
Patent number
4,267,971
Issue date
May 19, 1981
John Blue Company
Douglas Johnston
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Pump for soil fumigant
Patent number
4,141,676
Issue date
Feb 27, 1979
John Blue Company Division of Subscription Television, Inc.
Robert L. Jannen
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Rotating nozzle sparging system for suspension fertilizer tanks
Patent number
4,100,610
Issue date
Jul 11, 1978
John Blue Company Division of Subscription Television, Inc.
Douglas Johnston
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Tramper for cotton module maker
Patent number
3,961,572
Issue date
Jun 8, 1976
John Blue Company Division of Subscription Television, Inc.
Douglas Johnston
B30 - PRESSES