The office was founded in Barmen in the seventies of the
19th century as an engineering firm. After the patent law of 1877 came
into force the first patent application was filed on October 25, 1877.
After the second world war with the destruction of the
office through an airstrike in 1943, the society was rebuilt by patent
attorney Dipl.-Ing. Joseph Ludewig.
Afterwards the patent attorneys Dipl.-Phys. Karl Georg
Buse, Dipl.-Phys. Norbert Mentzel and Dipl.-Ing. Karlheinrich Ludewig
joined the society.
Since 1971 the name of the patent society is:
After the age-related withdrawal of Joseph Ludewig and
Karl Georg Buse, patent attorney Dipl.-Ing. Eva Kohlstedde nee Hoppe
joined the society. The society is headed by Norbert Mentzel,
Karlheinrich Ludewig and Eva Kohlstedde.
Dr. rer. nat. Heike Börner belongs to the society as European Patent Attorney..
The attorneys are assisted by a team of employees and secretaries.