Title	Patent Filing Date
VLF navigation system	1973-11-19
Method of radio navigation	1974-12-05
Acoustic transponder navigation system	1964-02-05
Coded navigation system	1974-04-03
Satellite radio ranging velocity navigation	1973-07-05
Control for navigation receivers, radio compasses, radio, and aircraft telephony, transponders and the like	1974-05-02
Navigation aiding systems with one-way ranging and two-way synchronization	1973-03-09
Updated diver navigation device	1974-12-23
Signal processor for doppler type navigation system	1975-02-27
Interferometric navigation and guidance system	1975-01-20
Navigation teaching aid	1973-12-12
Navigation receiver system for synchronizing to noisy, asymmetrical signals	1973-06-01
Perspective navigation system employing the inner comparisons of signal phases received on an aircraft by a plurality of sensors	1974-05-21
Doppler perspective navigation system employing the comparisons with a reference source of signal phases received on an aircraft by a plurality of sensors	1974-05-21
Doppler radio navigation beacon system with means for reducing multipath signal effects	1974-06-17
Method of and apparatus for ground testing doppler navigation sets-a doppler radar simulator	1974-08-21
Method of combined navigation of a barge or a lighter on sea and inland waters and apparatus for carrying out the said method	1975-04-11
Precise navigation buoy	1975-02-10
Radio navigation system	1970-12-10
Digital range computer systems for air navigation systems such as tacan	1965-06-29
Multiple beam glide slope radio navigation method with two classes of beams	1975-02-14
Synchron timing of signals in spaced transmitters and in a receiver for a phase comparison navigation system using time sequential transmissions	1974-11-15
Phase comparison radio navigation system receiver having phase memory oscillators for phase locking to time-sequentially received transmissions	1974-11-15
Phase comparison radio navigation system with time-sequenced transmissions from spaced stations using selectable phase memory oscillators in a receiver	1974-11-15
Tracking filter for frequency measurement in a Doppler type navigation guidance system or the like	1975-02-06
Transmission device of a radiographic navigation system	1975-05-02
VOR receiver with improved performance in a Doppler navigation system	1974-04-22
Steered lateral course transition control apparatus for aircraft area navigation systems	1975-05-29
Method for frequency cross-coupling of channels in an Omega Navigation receiver system	1975-04-28
Transmission of radio navigation phase corrections	1974-06-28
Helical vertical path control apparatus for aircraft area navigation system	1975-05-29
Digital area navigation system and combined magnetic card reader and encoder	1975-04-18
System for communication and navigation	1973-08-20
Dual-frequency circularly polarized spiral antenna for satellite navigation	1975-11-03
Vertical navigation control system	1975-04-18
Radio navigation beacon	1975-07-21
Ground station for a VOR navigation system with means for identifying spurious responses at a remote VOR receiver	1975-12-10
Vertical path control for aircraft area navigation system	1975-07-24
Navigation system and method	1975-07-15
Method and system for navigation employing incremental range difference	1975-09-02
Navigation system for maneuvering a structure about a submerged object	1975-09-18
Multiple frequency navigation radar system	1975-11-10
Shipboard reference for an aircraft navigation system	1975-10-24
Simplified strapped down inertial navigation utilizing bang-bang gyro torquing	1975-10-21
Radio navigation with separate correlated scans to avoid reflection interference	1976-03-19
Helicopter navigation system	1975-04-25
Marine navigation instrument	1976-05-17
Doppler navigation system with reference signal source diversity	1976-12-20
Doppler navigation method for determining the distance travelled by a vehicle	1976-05-19
Area navigation system	1974-06-05