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Message from the President Our story Our Mission Certificates /Patents		Certificates /Patents 1. ISO9001: Attestation Certificate of Quality Control System (2008) 2. AAA for Enterprise Credit Grade Certificate (2008) 3. AAA for Enterprise Credit Grade Certificate (2007) 4. AAA for Enterprise Credit Grade Certificate (2001-2006) 5. Letter of Patent for the Compound Color Light Signal head 6. Letter of Patent for the Railway Signal Equipment Box Locker 7. Letter of Patent for the Railway Signal Light Filament Transformer 8. Letter of Patent for the Rotary Type Wiring Terminal 9. Letter of Patent for Wiring Signal Board Device 10. Letter of Patent for the Compound Prefocus Light Plate (Utility Model)

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