Solid, Solid[ One-piece double barrels] are not a new inovation!In 1870 the Joseph Whitworth Company, the foremost U.K. mechanic of the day, was issued a patent covering one-piece barrels!Examples of these barrels sometimes surface on guns made in the U.K. A fine example of these barrels was found on a 12G hammer double, by Ingram.This gun was covered in series of articles in the Shooting Times, circa 1986, by the late Geoffrey Boothroyd. Investigations carried out included X-Ray examination that clearly shows the one-piece construction.
So far as Mr Lippard,s work is concerned, despite being an excellent example of C.N.C machining, I could see no evidence in the process patent [not a design patent] that was not pre existing & established Tool design/manufacturing technology.
