US1572730A
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Batch for making ceramic material and to alpha ceramic material made therefrom
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US1529259A
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Glass
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US1608029A
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Insulator
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US1510521A
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Glass
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US1431166A
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Glass
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US1626042A
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Glass
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US1156163A
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Manufacture of insulators for high-potential electric conductors.
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US1225147A
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Insulator.
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US1226088A
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Insulator and composition material for insulating and other purposes.
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US1120951A
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Manufacture of insulators for high-potential electric conductors.
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US1127044A
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Insulator.
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US1091679A
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Insulator.
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US1116303A
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Arc-extinguisher.
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US1127043A
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Electric-arc extinguisher.
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US1091678A
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Insulating composition.
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US1127042A
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Manufacture of high-potential porcelain and glass insulators.
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US870187A
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Wall-insulator.
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US918339A
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System of insulation for high-voltage electric conductors.
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US872569A
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System of insulation for high-voltage electric conductors.
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US903875A
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System of electrical insulation.
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