Patent for Wireless Receiving Value, invented by Roger Elvan Richards of Rhyl

Scope and Content

Papers re: invention by Roger Elvan Richards of Rhyl, including: Patent specification No. 145,040, complete specification for 'Improvements in Radio Transmitters', accepted 12th May 1921; booklet 'Patents and Trade Marks' by B.T. King, c.1920s; correspondence. File No. 3503.


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