The Earnest Dumoulin Co. is located. I believe, in Herstal, Belgium. I do not believe that they are currently being imported into the U.S. or have an offical importer. They manufactured, at least in...
Well I searched for the answers as well on google.com but I couldn't find anything about it when it started. All I know is it was founded by the same people who created the ENIAC Computer
Presper...
Databases such as Hoovers will allow you to trace who took over the rights; often even Wikipedia will be able to tell you who acquired the assets when the company dissolved.
If you can not find google, a good idea is to try other search engines, or use an encyclopedia. Not many people know what to do with these, but they are a great source of information when you need to...