Patents by Inventor Ronald Krochmal

Ronald Krochmal 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).

  • Precious stone
    Patent number: D500961
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: January 18, 2005
    Assignee: L. Krochmal and Sons, besloten vennootschap met beperkte aansprakelijkheid
    Inventor: Ronald Krochmal
  • Precious stone
    Patent number: D506411
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: June 21, 2005
    Assignee: L. Krochmal and Sons
    Inventor: Ronald Krochmal