W.R. Jorgenson Patent No. 1,156,293 for the Jostam Anti-Flinch pad was granted Oct 12, 1915 BUT when the pad was first available is uncertain.
The Hawkins Model 25 Recoil Pad by the Cushion Pad Co. was offered about 1920.
The Jostam Hy-Gun first appeared in sporting catalogs about 1927.
The NOSHOC pads have a June 6, 1922 patent date, but were not found in catalogs until the early 1930s.
The repro Hawkins pads are heavy and will alter the balance of the gun; OK on a long barrel 12g trap gun. The repro Jostam pads are nice.