Company Filing History:
12 out of 14 
1 out of 11 
1 out of 5 Years Active: 1989-2008
Title: **Innovative Contributions of Jeffrey F. Liu in Data Access Technologies**
Introduction
Jeffrey F. Liu is a prominent inventor based in San Jose, California. With an impressive portfolio of 14 patents, he has made significant strides in the fields of data access technologies and optical media. His inventions contribute to enhanced efficiency and security in data storage and retrieval processes.
Latest Patents
One of Liu's latest innovations is a **data access device using a rotational head to access data stored in data strips and data arc segments or data circles**. This invention presents a data card with multiple data arcs alongside a linear data track, such as a magnetic or optical data strip on a flat storage medium. The card is adaptable as a credit card or ID card, integrating conventional magnetic strips while utilizing data arc segments for added security. This feature ensures that the cardholder's biometric information is safely authenticated, thus preventing fraudulent activities.
Another notable patent is related to **an optical disk tracking servo circuit** designed to enhance the performance of an optical head on optical media. This invention addresses the challenges faced when encountering non-continuous track segments or prolonged defects on disks. By integrating a circuit that adjusts the loop gain of the tracking servo in response to detected defects, Liu's invention improves the responsiveness of the optical pickup head, ultimately preventing track skipping and enhancing data retrieval accuracy.
Career Highlights
Throughout his career, Jeffrey F. Liu has worked with various innovative companies, including Dcard, Inc. and Microscience Limited. His contributions to these organizations have significantly shaped developments in data technology and optical systems, underscoring his role as a key player in technological advancements.
Collaborations
Liu has collaborated with talented individuals such as Francis K. King and Shand-Ling Mao. Their collective expertise in technology and innovation has likely played an instrumental role in the development of Liu’s patented inventions, enhancing their effectiveness and application in the industry.
Conclusion
Jeffrey F. Liu's contributions to the fields of data access technology and optical media tracking are notable and influential. With multiple patents to his name, his work not only reflects personal ingenuity but also contributes to the broader landscape of technological innovation. His ongoing commitment to improving data security and retrieval mechanisms paves the way for future advancements in the field.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.