25 Utility Patents
#22 in Essen
#5,795 in Germany
#119,197 in the World
Forward Citations = 250
Company Filing History:
Didier Engineering Gmbh
Didier-werke Ag
Bergwerksverband Gmbh
4. 1 out of 141
Krupp Koppers Gmbh
5. 1 out of 2
Still Otto Gmbh
where one patent can have more than one assignee
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