History of Smart Manholes

Year 2020

Intellectual Property Office of Viet Nam issued the Certificate of Trademark Registration

Years 2018 - 20197th Generation

Copyright Office of Viet Nam issued the Copyright Certificate 7th version

The 3rd version of multi-function prevent backflow, odor and solid-waste collecting manhole was completed

Year 20166th generation

The 2nd version of plastic anti-backflow and solid-waste collecting manhole was made

Year 2015

The NOIP issued Patent’s Certificate

Years 2012 - 20145th generation

Participated and granted as one project of Program 68 (Ministry Science and Technology)

Year 20114th generation

The 1st version of plastic anti-backflow manhole was born.

Year 20103th generation

The idea of anti backflow manhole

Year 20092th generation

The 1st version of plastic solid-waste collecting manhole was born.

Year 2007

Copyright Office of Viet Nam issued the Useful Solution Certificate

Year 20041st generation

The idea of solid-waste collecting manhole