The story
From the trademark Duo-Tang, registered in 1962 by the Duo-Tang company.
Etymology from Wiktionary, CC BY-SA 4.0.
Duo-Tang
Today it means: A folder with flexible metal fasteners. Full definition →
Today it means: A folder with flexible metal fasteners. Full definition →
From the trademark Duo-Tang, registered in 1962 by the Duo-Tang company.
Etymology from Wiktionary, CC BY-SA 4.0.