Research/Patents/US 4939698
US 4939698

SONAR SYSTEM

Assignee

Filed

Apr 26, 1966

Granted

Jul 3, 1990

Location

SUNNYSIDE FL US

Abstract

A sonar system having a transmitter for successively broadcasting a pair ofcoustical signals having different frequencies, a programmer for determining the times said pair of signals are broadcast, a receiver for receiving said pair of signals after they have been reflected from a target, a programmer for effecting the conversion of said received pair of signals into a continuous unitary electrical signal having variable consecutive time periods which alternately contain the respective frequencies thereof, and a readout for displaying said continuous unitary electrical signal.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jan 7, 1982

Rescinded

Feb 21, 1990

Duration

8 years, 1 month

Inventor

  • 1FRANCIS J. MURPHREE

Technology Domains

Click a domain to browse all patents in this category.

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