Toussaint-Henry-Joseph Fafchamps
Joseph Montigny further improved the weapon, completing the transportable 37-barrels Montigny mitrailleuse (also known as the "Fafschamps-Montigny mitrailleuse") in 1863. From 1859, Joseph Montigny proposed his design to Napoleon III, which led to the development of the French Reffye mitrailleuse, designed by Jean-Baptiste Verchère de Reffye with the collaboration of Montigny, and which was adopted by the French Army in 1865. The invention of Fafschamps thus became the basis of the "mitrailleuse", which was used by the French in the Franco-Prussian War of 1870. Initially kept under wraps as a secret weapon, it became widely used in battle by French artillery during the Franco-Prussian War (1870–71).
John Pedersen (arms designer)
Many of Pedersen's U.S. military efforts were stymied by fate. Although the Navy recommended adoption of his .45 pistol design, the outbreak of World War I led to the design being shelved in favor of the M1911 pistol already in production for the Army. His most famous invention, the Pedersen Device, never had a chance to significantly affect the battles on the Western Front during World War I: the war ended before it could be manufactured in quantity and sent to France to equip the American Army (only 65,000 were produced out of planned production of 500,000). In the 1920s U.S. Army Ordnance selected his .276 Pedersen cartridge to replace the .30-06 in the infantry rifle and tested Pedersen's unique toggle-linked semi-automatic rifle in competitions at Aberdeen Proving Ground. The Pedersen rifle lost out to the rifle designed by John C. Garand. General MacArthur later vetoed the adoption of .276 Pedersen as the new infantry cartridge. General George S. Patton owned a Remington Model 51 and was thought to favor the weapon and is seen in many photos of the era wearing it as his personal sidearm. During World War II, John Pedersen's attempts through the Irwin-Pedersen Arms Company to mass-produce M1 Carbines for the U.S. military failed.