First patent case that Ammann & Co. worked on. The text was written on multi-sided copying paper using a typewriter so that there were copies for the responsible office, the client and their own file. The following anecdote is fitting: Although Chester Carlson, curiously a physicist working for the patent department of a US company looking to simplify the process of copying patent specifications and drawings, had already invented Xerography in 1938 the path to marketability was a long one. Copying machines could only be marketed starting in the 60s.