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Fluid driven tool control device
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Patent number 5,189,844
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Issue date Mar 2, 1993
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Northern Research & Engineering Corp.
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Michael C. Swarden
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Absorption dynamometer
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Patent number 4,744,724
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Issue date May 17, 1988
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Northern Research & Engineering Corp.
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Walter L. Brassert
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Expansible coupling
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Patent number 4,718,702
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Issue date Jan 12, 1988
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Northern Research & Engineering Company
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Calvin Rushforth
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Particulate dispersion apparatus
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Patent number 4,717,075
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Issue date Jan 5, 1988
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Northern Research & Engineering Corp.
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Anthony F. Carter
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B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
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Fog oil smoke generator
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Patent number 4,697,520
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Issue date Oct 6, 1987
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Northern Research & Engineering Corp.
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Walter L. Brassert
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F41 - WEAPONS
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Gas turbine combustion chamber arrangement
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Patent number 4,040,251
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Issue date Aug 9, 1977
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Northern Research and Engineering Corporation
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Arnold M. Heitmann
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Gas turbine
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Patent number 4,038,815
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Issue date Aug 2, 1977
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Northern Research and Engineering Corporation
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Arnold M. Heitmann
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS