China.
As early as 2018, Guangzhou Langnu Outdoor Sports Goods Co., Ltd. submitted an application for an invention patent for "a quick-release cobra buckle."
First, the cobra buckle belt has a unique quick-put-on-and-take-off function. With a gentle push or press, and a crisp ‘click’ sound, you can put on or take off the belt in an instant.
Secondly, the cobra buckle also has strong tensile strength. Some parachute equipment or safety belt equipment also use cobra buckles.