Issued Patents All Time
Showing 25 most recent of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12429335 | Personal navigation device operable in GNSS-denied environment | — | 2025-09-30 |
| 12422567 | Methods and apparatus to reduce communications for position, navigation and timing determinations | Kenneth C. Clark, Andrey Tolstov, Tung-Ching Tsao, Cody L. Gruebele, Chang Jin Yoo | 2025-09-23 |
| 12228408 | Sensor data fusion system with noise reduction and fault protection | Chang Jin Yoo, Tung-Ching Tsao, Andrey Tolstov, Cody L. Gruebele | 2025-02-18 |
| 12204019 | System and method that facilitates precision landing of an aerial vehicle | Tim Murphy, Greg L. Sheffield | 2025-01-21 |
| 11977171 | Position, navigation and timing system architecture based on signals of opportunity | — | 2024-05-07 |
| 11846685 | Lorentz force velocity sensor system | Matthew Pelliccione, Danny Kim, Travis Autry, Brian C. Grubel, James H. Kober | 2023-12-19 |
| 11821733 | Terrain referenced navigation system with generic terrain sensors for correcting an inertial navigation solution | Chang Jin Yoo, Cody L. Gruebele | 2023-11-21 |
| D995495 | Earphone | Qing Li, Keliang Xun | 2023-08-15 |
| D987997 | Earphone case | Qing Li, Keliang Xun | 2023-06-06 |
| 11387883 | Estimator for determining updates to an estimated local state vector | Chang Jin Yoo | 2022-07-12 |
| 11168984 | Celestial navigation system and method | Tung-Ching Tsao, Harold A. Klotz, Jr., Bruce M. Pope, Paul J. Haug | 2021-11-09 |
| 10993121 | Estimator for determining updates to an estimated local state vector | Chang Jin Yoo | 2021-04-27 |
| 10694148 | Image-based navigation using quality-assured line-of-sight measurements | Tung-Ching Tsao, Amir Leon Liaghati, Shanshin Chen | 2020-06-23 |
| 9846240 | Multi-level/multi-threshold/multi-persistency GPS/GNSS atomic clock monitoring | Kamran Ghassemi | 2017-12-19 |
| 8543266 | Modified Kalman filter for generation of attitude error corrections | Tung-Ching Tsao, Arunkumar P. Nayak | 2013-09-24 |
| 8370064 | Integrated global navigation satellite system and inertial navigation system for navigation and tracking | Kamran Ghassemi | 2013-02-05 |
| 8259012 | Software GNSS receiver for high-altitude spacecraft applications | Kamran Ghassemi, Clifford W. Kelley | 2012-09-04 |
| 8056863 | Unified attitude control for spacecraft transfer orbit operations | H. Grant Wang | 2011-11-15 |
| 8019544 | Real-time refinement method of spacecraft star tracker alignment estimates | David D. Needelman, Yeong-Wei A. Wu | 2011-09-13 |
| 7665695 | Unified attitude control for spacecraft transfer orbit operations | H. Grant Wang | 2010-02-23 |
| 7546983 | Spacecraft power acquisition method for wing-stowed configuration | H. Grant Wang | 2009-06-16 |
| 7487016 | Method for compensating star motion induced error in a stellar inertial attitude determination system | Richard A. Fowell, Yeong-Wei A. Wu | 2009-02-03 |
| 7310578 | Fast access, low memory, pair catalog | James P. Alstad, David D. Needelman, Richard A. Fowell, Peter Lai, Yeong-Wei A. Wu | 2007-12-18 |
| 7228231 | Multiple stayout zones for ground-based bright object exclusion | David D. Needelman, Richard A. Fowell, Peter Lai, Yeong-Wei A. Wu | 2007-06-05 |
| 7219014 | Method and apparatus for real-time star exclusion from a database | David D. Needelman, Richard A. Fowell, Peter Lai, Yeong-Wei A. Wu, Bruce N. Eyerly +1 more | 2007-05-15 |