YENSEAL LLC . is a company specializing in the research and development, sales and service of engraving printing, hot stamping machines, office seals and inks.

The invention relates to a new type of seal, including a casing, a printing component and an unlocking component, and a control circuit board and a battery are also arranged in the casing.

Inventor of the Back Ink Seal
The world's advanced industrial engraving, anti-counterfeiting solutions/technology