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Rotating electrical machine
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Patent number 4,047,062
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Issue date Sep 6, 1977
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Ludwig Ludin
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Axial flow pump for a pivotal rotor
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Patent number 4,035,108
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Issue date Jul 12, 1977
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Nikolaus Laing
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Thermal prime mover
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Patent number 4,004,426
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Issue date Jan 25, 1977
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Nikolaus Laing
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Electric submersible pump
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Patent number 4,002,936
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Issue date Jan 11, 1977
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Nikolaus Laing
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Rotary heat exchanger
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Patent number 4,000,777
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Issue date Jan 4, 1977
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Nikolaus Laing
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F28 - HEAT EXCHANGE IN GENERAL
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Thermal prime mover
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Patent number 3,996,477
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Issue date Dec 7, 1976
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Nikolaus Laing
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Motor car heater
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Patent number 3,990,636
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Issue date Nov 9, 1976
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Nikolaus Laing
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B60 - VEHICLES IN GENERAL
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Controllable heat pipe
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Patent number 3,934,643
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Issue date Jan 27, 1976
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Nikolaus Laing
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F24 - HEATING RANGES VENTILATING
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Bearing lubricated with water
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Patent number 3,933,223
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Issue date Jan 20, 1976
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Ludwig Ludin
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...