About Aristo

Dennert & Pape is founded in Hamburg as a workshop for geodetic and mathmatical instruments. (Theodolites, levels, planimeters and much more).

The first slide rulers are made of boxwood.

Start of production off slide rulers with celluloid veneer.

Max Rietz (1872-1956) proposed the scale system for slide rulers be named after him. The "Rietz System" becomes the universal tool for engineers. 

The DUPA trademark is introduced for all Dennert & Pape products.

Slide rules and drawing instruments are primarily made from the newly developed plastic ASTRALON, which was the first to be marketed on the world market. The ARISTO trademark was introduced in the same year.

The construction of a production facility in Austria begins.

The slide ruler 'ARISTO-Studio' is launched and celebrates success around the world.

The flight navigation computers ARISTO-Aviat and ARISTO-Aviat G replace "System Knemeyer" DR3" and DR4".

The first ARISTO coordinatograph controlled by punched tape goes into production. 

After lengthy negotiations with the Austrian Ministry of Finance, the company is bought back by the previous owner family.

The classic Geodreieck ® is developed and registered as an internationally registered and protected trademark. Millions have now been manufactured and have become the standard drawing tool in schools and training in many countries.

The first pocket calculator mass-produced in germany under the name Aristo M27 becomes a great success. He only masters the four basic types of arithmetic. 

Aristo-Hamburg was sold to the then competitor Rotring, also based in Hamburg. The slide rule production is discontinued and immediately afterwards the entire pocket calculator program is removed from the range.

In the course of a management buy-out, leading employees of ARISTO-Wörgl acquire the worldwide trademark rights for the manual ARISTO drawing devices including the production site. The GEO tec sign and plastic technology GmbH is founded and starts with approx. 150 ARISTO products.

ARISTO celebrates its 10th anniversary under the new roof. The ARISTO range of drawing instruments now included 500 products and is active in 50 countries outside of Austria.

Our world-famous Geodreieck® is 50 years old!

As part of restructuring of the previous GEOtec sign and plastics technology GmbH, the company name is changed to GEOtec Schul- und Bürowaren GmbH

For us, received the Austrian eco-label means another chapter in the sucess story of the ARISTO brand and the obligation as a company to continue on the path we have taken consistently and with consideration for our environment.  

The company building of Geotec school and office supplies as well as GEOTEC drawing and plastics technology was badly damaged by a major fire on the night of December 8th, 2020. Most importantly, luckily, no one was hurt.

The Geocover 3in1 sets expand the ARISTO range to a total of 22 eco-label items. The makes ARISTO one of the brands with the most UMWZ entries in the area of school and office supplies and thus impressively high-quality, sustainble and regionally manufactured products.