• About Us

    What is this 'Erfindungsbüro' at all?


E-RM Erfindungsbüro is a company from Berlin, Germany. It was founded in 2013 by Maximilian Rest and Rudolph Ribeiro Maier.

We have expertise in electrical and mechanical engineering, digital signal processing, product development and manufacturing processes. Together with our partners we put a lot of effort into our products to solve problems we observe in the field. We move slow but thoughtful.


We chose all of our suppliers with great care and with respect to our personal high standards.

To be able to control as much of our supply chain a possible, we decided to manufacture everything with local partners around Berlin. That’s how we take our social and ecological responsibility seriously.

Mitja Cerkvenik portrait

Mitja Cerkvenik

Mitja has a background in Electronics, Music and Art and holds a degree in Computer Science from the University of Ljubljana. He started making computer based music in 1997 as jesusonecstasy and is developing electronic musical instruments for his live acts and intermedia art installations since 2011.

You can certainly be sure that the E-RM product you own was inspected, assembled and tested by him and his great eye for detail.

Maximilian Rest portrait

Maximilian Rest

Since his pre-teen years, Max has been tinkering with Electronics and was introduced to microcontrollers a few years later at Chaos Computer Club. He holds an M.Sc. in Electrical Engineering from TU Berlin. Formerly the drummer in a couple of highschool bands, he is now in love with signal processing and product design.

At E-RM, he is taking care of the general direction of the company, oversees product development and conducts research in the field of analog modeling.

Rudolph Maier portrait

Rudolph Maier

Rudolph knows how to tune up a two-stroke engine, construct things with all imaginable materials and holds a degree in Mechanical Engineering from TU Berlin. When it comes down to the details of industrial production processes and manufacturing, he is the source of knowledge and experience.

In the company, he is responsible for production planning, quality management, procurement and mechanical design.