German DRGM and trademark info is mostly unavailable.Yes it is a nice town. I life close to it. My hometown is Salzgitter, something like 40km from Hannover.
Do you have an archive or something with informations on shaving items, like Patent D.R.G.M and trademark infos?
You're right, the German Patent Office in Berlin was bombed in 1945. However, most of the documents were outsourced before bombing to avoid destruction. The Harz Mountains, a low mountain range near my home, were often used to store valuable documents, art, etc. There are a lot of old mountain tunnels there. See the Clooney movie Monuments Man. After the war, the D.R.G.M. files were never found. Maybe they are in some archive in the USA or Russia, or are still there, but nobody knows.German DRGM and trademark info is mostly unavailable.
The German patent office in Berlin was bombed to bits in 1945 with most documents lost.
What's left has never been properly put online.
The German Patentamt (https://depatisnet.dpma.de) has a lot of stuff on microfiche, but they still haven't digitized much (if any) of it.
A trip to Munich is your best bet I'm afraid.
I live in Salzgitter a smaller town between Hannover and Braunschweig.Hello from Hannover, Germany