Inventor

LEE DONG KWANG

KR2 patents

Patents

2 patents

US11821213B2Nov 21, 2023

Block-type prefabricated ramp

HUMAN TECH & COMPLEX CO LTD1 citations49

US11918521B2Mar 5, 2024

Foldable ramp

HUMAN TECH & COMPLEX CO LTD0 citations39