Partial use of a patented invention in a rationalization project does not constitute its use under Polish patent law.

The Supreme Court dismissed the plaintiffs' appeal seeking compensation for using a patented invention. The court found that while the defendants used a rationalization project, it only partially incorporated the patented invention's technical features, specifically regarding motor regulation. Consequently, the court ruled that this partial application did not qualify as 'use' of the invention under the relevant statute, rendering the compensation claim invalid.