As Mr. Rhodes relates, Hedy Lamarr was hardly an intellectual, but she was a indefatigable tinkerer.

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"When picking up drugs, patients want to get in and out quickly, " said Hedy Cohen, a spokeswoman for the Institute for Safe Medication Practices.

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As you have said, in 1940 Hedy Lamar (Obituary, January 29th) and a film-score composer, George Antheil, developed the technology, then called spread spectrum.

ECONOMIST: Letters | The