Patents by Inventor Linh Phan

Linh Phan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250212171
    Abstract: The invention addresses a method for simultaneously retrieving NTRIP data streams and transmitting positioning data using a 4G network for low-cost RTK positioning systems. This method employs the PPPoS protocol and the LwIP library, along with the implementation process of applying this method to real-world systems. The approach enhances data update rate and ensures high accuracy with a superior RTK “Fixed” positioning rate for affordable RTK systems, significantly optimizing hardware system costs. The effectiveness of the invention has been demonstrated through practical testing, showing a marked improvement and complete resolution of the limitations associated with the previous AT command method.
    Type: Application
    Filed: October 23, 2024
    Publication date: June 26, 2025
    Applicant: VIETTEL GROUP
    Inventors: QUANG DAN CHU, NGOC KHIEM TRAN, PHUONG NAM LE, THI HONG LINH PHAN
  • Patent number: 5744587
    Abstract: Methods of removing protein contaminants from a solution comprising thrombopoietin are disclosed. The solution is exposed to hydroxyapatite, whereby protein contaminants are bound to the hydroxyapatite and the thrombopoietin remains substantially unbound, and the unbound thrombopoietin is recovered. The use of hydroxyapatite is advantageously combined with other purification and concentration techniques, including ion-exchange chromatography, ligand affinity chromatography, hydrophobic interaction chromatography, ultrafiltration, and differential precipitation.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 28, 1998
    Assignee: ZymoGenetics, Inc.
    Inventors: Andrew R. Alaska, Jin-Jyi Chang, William Downey, John W. Forstrom, Linh Phan