British patent n° 11293 – Improvements relating to the Utilization of Electromagnetic, Light, or other like Radiations Effects or Disturbances transmitted through the Natural Media and to Apparatus therefor
Published June 1, 1901
Printed in London
1s Edition. Original Printed patent disbound. About 27cm by 18cm some wear and tear due to the disbinding. Item #31148
Price: £400 (i.e. €437 about)
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