Research/Patents/US 5034930
US 5034930

PASSIVE RANGING SONAR SYSTEM

Assignee

Filed

Feb 4, 1966

Granted

Jul 23, 1991

Location

QUAKER HILL CT US

Abstract

A passive acoustic detector including a line hydrophone and apparatus coud thereto operable to utilize the energy sensed by the elements of the hydrophone during passive listening to effect scanning in depression-elevation by delaying for directivity and then combining acoustic energies sensed by the hydrophone elements and recording the combined energies on an x-y strip recorder for enhanced signal-to-noise ratio.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jan 7, 1982

Rescinded

Aug 6, 1990

Duration

8 years, 7 months

Inventor

  • 1WALTER L. CLEARWATERS

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records