@kurtschwehr : The first patent for a multibeam sonar was filed in 1962: "Radiation mapping system" patents.google.com/patent/US31446… • TwiCopy

Kurt Schwehr, PhD

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Kurt Schwehr, PhD

25 days ago

The first patent for a multibeam sonar was filed in 1962: "Radiation mapping system" patents.google.com/patent/US31446…

The first patent for a multibeam sonar was filed in 1962: "Radiation mapping system"

patents.google.com/patent/US31446…

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