Certain exceptions to the protection are the private use of the patent without commercial purposes and for experimental use.
Evolution of the principle of "experimental use" exemption:introductionand evaluation of the legislation and judicial practice in Germany
The casual and experimental use of fly agaric in Western cultures has steadily increased since the 1960s.
Patent infringement demur of the statutory exemption include exhaustion of patent rights, prior user rights, temporarily passing through, specifically experimental use, liable applications, etc.
put to the test, as for its quality, or give experimental use to.