| 9379834 | Time space coherence interferometer | Apr 30, 13 | Jun 28, 16 | NEARFIELD SYSTEMS INCORPORATED |
| 9052375 | Method for validating aircraft traffic control data | Jul 22, 10 | Jun 09, 15 | THE BOEING COMPANY |
| 9002354 | Interference control, SINR optimization and signaling enhancements to improve the performance of OTDOA measurements | Jun 10, 10 | Apr 07, 15 | GOOGLE TECHNOLOGY HOLDINGS LLC |
| 8744800 | Adaptive DME transmitter architecture | Sep 22, 11 | Jun 03, 14 | ROCKWELL COLLINS, INC. |
| 8159395 | Communication device, communication system, position detection method and program | Dec 23, 09 | Apr 17, 12 | SONY CORPORATION |
| 6982666 | Three-dimensional synthetic aperture radar for mine detection and other uses | Jun 08, 01 | Jan 03, 06 | The United States of America as represented by the Secretary of the Navy |
| 6097338 | Instrument landing system glide path transmitter device | Mar 24, 99 | Aug 01, 00 | Airsys Navigation Systems GmbH |
| 5999129 | Multiplatform ambiguous phase circle and TDOA protection emitter location | Jun 01, 98 | Dec 07, 99 | LITTON SYSTEMS, INC., NORTHROP GRUMMAN SYSTEMS CORPORATION, |
| 5163004 | Position tracking system | Jan 11, 91 | Nov 10, 92 | GPS INDUSTRIES, INC., RANGEMASTER GOLF ENTERPRISES, A GENERAL PARTNERSHIP OF CA, |
| 4888740 | Differential energy acoustic measurements of formation characteristic | May 30, 86 | Dec 19, 89 | SCHLUMBERGER TECHNOLOGY CORPORATION |
| 4730192 | Monitor for an electronic TACAN beacon | Mar 21, 85 | Mar 08, 88 | International Standard Electric Corporation |
| 4675684 | Distance measuring receiver system and method | Sep 19, 86 | Jun 23, 87 | OHL, JOHN P. |
| H000292 | Apparatus for the detection of angles-of-arrival of radio frequency signals | May 07, 86 | Jun 02, 87 | The United States of America as represented by the Secretary of the Army |
| 4644358 | Stem orientation measurement apparatus | Jun 23, 83 | Feb 17, 87 | Nihon Musen Kabushiki Kaisha |
| 4593379 | Method and a device for synchronization of messages | Jan 06, 82 | Jun 03, 86 | THOMSON-CSF |
| 4562437 | Digital loop filter | Dec 27, 82 | Dec 31, 85 | FUJITSU LIMITED |
| 4496951 | Hyperbolic navigation receiver | Dec 31, 81 | Jan 29, 85 | FUJITSU LIMITED |
| 4472720 | Area navigational system using geosynchronous satellites | Mar 24, 80 | Sep 18, 84 | Not available |
| 4442432 | Electronic navigation method and system | Sep 17, 81 | Apr 10, 84 | Not available |
| 4396918 | Low-frequency radio navigation system | Mar 06, 81 | Aug 02, 83 | UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION |