Contrary to its name, the trapper pattern was not exclusively utilized by trappers and likely found more prevalent use on farms. The historical origins of the trapper pattern present challenges in tracing, with the initial version believed to have emerged around 1900, attributed to either Case knives or the precursor to KABAR, Union Cutlery. This distinctly American pattern is characterized by equal-length clip point and spey blades. Although handle shapes and size may vary among manufacturers the majority of trappers feature a reverse dog-leg style handle.

The cutlers in Sheffield, England, were known to produce "dog-leg jack" knives that strikingly resembled the trapper, although with unequal blade lengths. It’s possible that these knives served as a precursor to the now classic trapper pattern. The name “trapper” was likely an attempt to help sell the knife, by aligning it with a common trade of the time.

The most authentic form of the trapper knife pattern, includes a reverse dog-leg handle with bolsters on both ends. This design holds two 3.25” blades, a primary clip point blade and a secondary spey blade, typically measuring 4.125” closed. However newer manufacturers frequently label knives as a “trapper” even if they differ from this standard sizing, causing debate among collectors.

Despite its current popularity, the trapper knife struggled in terms of sales until the post-World War II era. However, in the years that followed, it has emerged as a prevalent choice for many as an everyday carry (EDC) and has also become a sought-after item for collectors. Brands such as Bear and Son Cutlery, Buck, Böker, Case and Schrade knives, continued to innovate on the timeless design by releasing limited, collectors edition trappers, or by incorporating new and exotic materials like carbon fiber, or micarta into their handles.