Below is a list of excerpts from Claas patents relating to the subject of
"choppers".
Note: The decisive factor for a patent is always the "claims", as specifically what exactly the
applicant claims as his invention!
This application describes the principle of the "RU" corn header:
https://worldwide.espacenet.com/patent/search/family/006533558/publication/DE19535453A1?q=DE19535453
This registration concerns the successor model of the "RU", the "Orbis":
https://worldwide.espacenet.com/patent/search/family/056082191/publication/DE102014118678A1?q=DE102014118678
Here is an application for a modular frame extension to accommodate a rowtrack:
https://worldwide.espacenet.com/patent/search/family/062486474/publication/EP3449714A1?q=EP3449714