Berthold Kerschbaumer (above) has very kindly been in touch from Austria, to clear up any confusion there might have been regarding the original design of the Mignon typewriter.
I posted on the Mignon at
There, I pointed out that in an article by Berthold which appears on Richard Polt’s The Classic Typewriter Page, (http://site.xavier.edu/polt/typewriters/mignon.html), Berthold wrote that the Mignon was developed “on the basis of a patent by Louis Sell of Berlin (No 149308 of December 22, 1901)”.
I had been unable to find any references to Sell elsewhere, and his name does not appear in US patents for the Mignon, first issued to Friedrich Heinrich Philipp Franz von Hefner-Alteneck (above). Hefner-Alteneck applied for his US patent on July 7, 1902, and it was issued on March 2, 1909, more than five years after his death.
Berthold has now been able to point me in the right direction.
Amazingly, Sell’s original German patent is almost identical to Hefner-Alteneck’s US patent. Hefner-Alteneck applied for the US patent for “his invention” less than seven months later!
SPOT THE DIFFERENCE!?An AEG subsidiary, Union Schreibmaschinen-Gesellschaft, started making the Mignon in 1904, a few months after Hefner-Alteneck died.
Was this one monstrous rip-off? It does appear that Sell sold the rights to his design to Hefner-Alteneck at Allgemeine Electrizitäts Gesellschaft, but Hefner-Alteneck then definitely claimed it as his own. And why, in subsequent years, was full credit for the Mignon given to Hefner-Alteneck alone, without any mention of Sell? We are indebted to Berthold for putting us straight on this.
Berthold tells me that a main source for his article was a story about Hefner-Alteneck which was written by Regina Buhr and published in Von Menschen und Maschinenin in 1993. “In her article, she cited documents from the Thüringisches Landeshauptarchiv - Bestand der Olympia Büromaschinenwerke, in which it is written that on basis of the Louis Sell patents (which were bought by AEG), the Mignon was developed.”
I wrote at the time of my Mignon post that, “Other histories credit the Mignon to Hefner-Alteneck, and it is true that at least the AEG Mignon was his design.“ This now turns out to patently untrue.
I am deeply grateful to Berthold for his help in clearing this up.