The gun was based on a John M. Browning Patent No. 1,143,170
granted June 15, 1915. However, Remington was gearing up for WW-I at that time and it would be six more years before the gun came out. Remington's designer John D. Pedersen made design refinements in 1919 (applications filed Sept. 15, 1919, Patent No. 1,429,621 granted Sept. 19, 1922 and Patent No. 1,487,799 granted Mar. 25, 1924) and G.H. Garrison made further improvements. It was the patents on these improvements that forced Ithaca to wait until 1937 to bring out their copy of this gun, though Ithaca had actually built some guns by 1932. Actually Pedersen has so many patent applications filed in that 1919 time frame it is hard to tell which really apply!