What is the presumption of operability in prior art references?
When a prior art reference expressly anticipates or makes obvious all elements of a claimed invention, it is presumed to be operable. This principle is established in case law, as stated in MPEP 2121:
“When the reference relied on expressly anticipates or makes obvious all of the elements of the claimed invention, the reference is presumed to be operable. Once such a reference is found, the burden is on applicant to rebut the presumption of operability.”
This means that patent examiners can rely on prior art references without initially proving their operability, shifting the burden to the applicant to demonstrate any lack of enablement.
To learn more:
Topics:
MPEP 2100 - Patentability,
MPEP 2121 - Prior Art; General Level Of Operability Required To Make A Prima Facie Case,
Patent Law,
Patent Procedure