This inventor holds 3 USPTO granted patents. Top assignees: Motorola Corporation, Sirf Technology, Inc.. Active years: 2005-2010.
Company Filing History:
Years Active: 2005-2010
Title: Innovations of James Stephen in GPS Technology
Introduction
James Stephen is an accomplished inventor based in Phoenix, AZ (US). He has made significant contributions to the field of GPS technology, holding a total of 3 patents. His work focuses on improving the efficiency and accuracy of satellite positioning systems.
Latest Patents
One of his latest patents is titled "Time-to-first-fix for position determination." This invention provides an improved time-to-first-fix (TTFF) for GPS systems by comparing the time-of-week (TOW) to the sub-frame identification (ID). The method involves dividing the TOW to form a ratio and performing a modulus operation on the ratio to create a remainder. If the incremented remainder matches the sub-frame ID, the TOW is considered valid, allowing for accurate calculation of pseudoranges and the determination of a receiver's location.
Another notable patent is "Satellite positioning system receiver time determination in minimum satellite coverage." This method includes acquiring a set of satellite positioning system satellites and determining satellite subset time based on over-determined position solutions for at least two different subsets of the acquired satellites. The invention computes a position solution based on the satellite time or a refined satellite time, enhancing the reliability of GPS systems even in challenging conditions.
Career Highlights
James has worked with prominent companies in the technology sector, including Motorola Corporation and SiRF Technology, Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in satellite positioning technology.
Collaborations
Throughout his career, James has collaborated with notable professionals in the field, including George Jeffrey Geier and Thomas Michael King. These partnerships have contributed to the advancement of his inventions and the overall development of GPS technology.
Conclusion
James Stephen's contributions to GPS technology through his innovative patents have significantly impacted the field. His work continues to influence advancements in satellite positioning systems, showcasing the importance of innovation in technology.