Who first invented the butterfly knife?

There isn't a specific inventor associated with the creation of the butterfly knife, but it can trace its origins to the Philippines, specifically Balisong Province during the 1700s.

The exact origin of the butterfly knife is shrouded in historical obscurity, but it's widely believed that knife-making practices on the Philippine island were influenced by various cultural exchanges, including influences from Indonesian, Malaysian, Spanish, and Chinese traditions.

The design and construction of the Balisong knife gradually evolved over time, with refinements made by local artisans and blacksmiths. However, the basic concept of the butterfly knife, with its iconic two folding handles that rotate around the blade, remained consistent.