SONAR SYSTEM
Assignee
Filed
Dec 8, 1966
Granted
Jul 3, 1990
Location
SUNNYSIDE FL US
Abstract
A sonar system having a sonar transmitter which is programmed to broadcastwo sets of several increasing frequency signals, with the frequency gap between each set thereof sufficient to cause them to distinguish between deep and shallow water targets, respectively. A heterodyne receiver receives target echoes of said sets of several frequency signals and converts them to two sets of identical frequency signals which are then readout as a single continuous target display signal.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Oct 28, 1981
Rescinded
Feb 21, 1990
Duration
8 years, 3 months
Inventor
- 1FRANCIS J. MURPHREE
Record Details
- Patent number
- US 4939699
- Application
- 04600701
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
More from this assignee
IMPROVED CATALITIC SYNTHESIS OF CAGED POLYNITRAMINE COMPOUNDS
SOLID ROCKET PROPELLANT
DUAL INFRARED BAND OBJECTIVE LENS
BANDGAP RADIATION DETECTOR
METHOD OF FORMING TEXTURED HIGH-TEMPERATURE SUPERCONDUCTORS
APPARATUS FOR CONTROLLING THE POSITION AND DIRECTION OF A LASER BEAM
Related by domain
AIRBORNE RADAR JAMMING SYSTEM
BOEING, COMPANY, THE
METHOD AND APPARATUS FOR THE DETECTION OF OBJECTS USING ELECTROMAGNETIC WAVE ATTENUATION PATTERNS
JG TECHNOLOGIES LLC
OPTICAL NIGHT VISION DEVICE WITH STANDARD LIGHT INTENSIFIER
THOMSON-CSF SEXTANT
MULTIPLE INFRARED MISSILE JAMMER
LOCKHEED SANDERS INC, A DELAWARE CORPORATION
LOW OBSERVABLE WEAPON KIT
Northrop
SYSTEM FOR DETECTING RADIATION IN THE PRESENCE OF MORE INTENSE BACKGROUND RADIATION
RAMSEY ELECTRONICS, INC.