Record

Document Reference	PPM/4/55
Title	Letter from Peter Mansfield to John G. McCarten of NRDC [National Research Development Corporation]; 3 April 1978
Date	3 April 1978
Extent	5 ff
Level	Item/file
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Content Description	Concerns possible infringement of United States Patent No. 4021726. Two copies of letter, one handwritten and one typewritten.