Patents by Inventor Sam Jun CHA

Sam Jun CHA 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).

  • VALUE-ADDED TAX CALCULATION SYSTEM USING MULTI-PURPOSE TAX INVOICE
    Publication number: 20230120259
    Abstract: Provided is a value-added tax calculation system using a multi-purpose tax invoice, whereby a double taxation effect and a redemption effect are removed from a value-added tax calculation method by using an all-stage tax credit method so that the value-added tax calculation system can be usefully used in a jewelry industry, etc.
    Type: Application
    Filed: August 3, 2020
    Publication date: April 20, 2023
    Inventor: Sam Jun CHA