Remember that Colt's first revolver was a five shot .36 cal revolver with a concealed trigger, that dropped down when you cocked the hammer. It was for these guns that the ' Slim Jim" holster was designed. The Walker was carried in heavy skirting leather buckets, or loops, on the saddle, as they were too heavy to carry on a belt. If Colt made a pocket patterson, it is news to me. Someone may have sawed off the barrel on that original Patterson colt, but I am not aware that the factory produced any short barreled, " pocket model". Years later, several short barreled variations were produced of the 1851, 1801, and 1861 colt revolvers. The 1849 was made in a small caliber, and some men carried that in LARGE pockets, but I don't think that really fits the definition of what we understand to be a pocket pistol, today.