1. October 27, 1998
   NGK STARTS MASS PRODUCTION OF CRYSTALLIZED GLASS SUBSTRATES FOR HARD DISKS
2. September 22, 1998
   NGK'S SUBSIDIARY STARTS MANUFACTURING PIEZOELECTRIC CERAMICS AT ITS NEW PLANT IN YAMANASHI
3. September 1, 1998
   NGK'S INDUSTRIAL HEATING SYSTEM DIVISION ACQUIRES ISO9001 CERTIFICATION
4. August 26, 1998
   NGK STARTS MANUFACTURING INSULATORS FOR UHV TRANSMISSION LINES IN CHINA
5. July 16, 1998
   NGK'S REFRACTORIES MANUFACTURING COMPANY ACQUIRES ISO14001 CERTIFICATION
6. July 3, 1998
   NGK STARTS MASS PRODUCTION OF HEXAGONAL CELL CERAMIC SUBSTRATES FOR AUTOMOTIVE CATALYTIC CONVERTERS
7. May 27, 1998
   NGK'S NUCLEAR SYSTEM EQUIPMENT DIVISION ACQUIRES ISO9001 CERTIFICATION
8. May 18, 1998
   NGK COMMERCIALIZES GLASS-LINED APPARATUS PREVENTING ACCUMULATION OF STATIC CHARGE
9. April 10, 1998
   OPENING CEREMONY FOR NGK'S CERAMIC MEMBRANE FILTRATION SYSTEM HELD AT OSHIKAWA DISTRICT WATER TREATMENT PLANT
10. April 8, 1998
    NGK'S THREE MAIN MANUFACTURING BASES SIMULTANEOUSLY ACQUIRE ISO14001 CERTIFICATION
11. March 27, 1998
    NGK ESTABLISHES A FOUNDATION TO ASSIST INTERNATIONAL STUDENTS IN JAPAN
12. February 19, 1998
    NGK'S ENVIRONMENTAL SYSTEMS AND EQUIPMENT DIVISION ACQUIRES ISO9001 CERTIFICATION FOR ITS QUALITY MANAGEMENT SYSTEMS
13. February 19, 1998
    NGK'S INDUSTRIAL APPARATUS BUSINESS DIVISION ACQUIRES ISO9001 CERTIFICATION FOR ITS QUALITY MANAGEMENT SYSTEMS

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