I got a really interesting patent in my mail recently, from Othais at C&Rsenal. It’s and idea clearly based on a Bergmann 1894 or 1896 pattern pistol, but instead of being blowback it uses a gas piston. And it’s not patented by Schmeisser or Bergmann, but instead by Carl Ehbets. If you recognize that name, it’s because he was an engineer for Colt in the late 1800s, largely responsible (in collaboration with William Mason) for Colt’s first swing-out cylinder double action revolver.
Now, this gas operated early Bergmann was not ever actually manufactured, so far as I can tell. At best, only experimental prototypes were made, and I have no actual evidence of that. Was this Ehbets trying to use someone else’s gun as a basis for his own improvements? Or was he perhaps acting as Bergmann’s agent in the United States, since he had plenty of experience with the US patent system?