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The Pamphlet Collection of Sir Robert Stout: Volume 40

Class 63.—Telegraphic Apparatus and Processes

Class 63.—Telegraphic Apparatus and Processes.

370—Hayes, J. E., Lambton Quay, Wellington.
  • Electric Office Indicator, designed for mercantile and other purposes
  • It enables the occupier, without rising from his chair, to indicate on the outside of his room or office door, whether he is engaged or otherwise. New invention (patented).