Description

British patent n° 20981 – Improvements relating to the Production, Regulation, and Utilization of Electric Currents of High Frequency, and to Apparatus therefor

Published September 22, 1896
Printed in London

1s Edition. Original Printed patent disbound. About 27cm by 18cm some wear and tear due to the disbinding. Item #31144

Price: £400 (i.e. €437 about)

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