1984

Established as "Koryo Industrial"

1985

Manufactured Earbud Tips for Panasonic, Aiwa, Sony and etc
Developed EPDM O-Rings for Water/Sewer Pipes

1989

Manufactured Urethane Earphone Dampers for Sony Korea

1993

Initiated Production of O-Rings for PlumbFast Co., Ltd., Providing Alternatives to Imported O-Rings

1998

Started Self-Production of Molds

1999

Certified to the ISO-9001

2010

Granted with an Utility Model for Earbud Tips

2000

Incorporated as "Koryo Industrial Co., Ltd."

2001

Obtained a Patent Registration for Silicone Rubber Rings (USA, Japan, China)

2017

Completed Construction of the Vietnam Plant (ISO-9001, ISO-14001 Approved)

2019

Company Name Changed to GEM (Goryeo Elastomers) Co.,Ltd.

2020

Implemented Software/Technology-Mediated Resource Management System
Expanded Vietnam Plant with Additional Cleanroom Facilities
Obtained Drinking Water Certifications (Europe and North America)