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Robert Frederick Ballantine
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13,476. Ballantine, R. F. June 14. Grant of Patent refused, Stereotype-matrix machines.-A flong of damp papier mÔchÚ or other material is impressed by a type-writer to produce a matrix or mould which is used in casting the stereotype plate.
GB190213476D1902-06-141902-06-14Improved Method for the Production of Stereotype.
ExpiredGB190213476A
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