Sandvik Intellectual Property AB v Quarry Mining & Construction Equipment Pty Ltd [2017] FCAFC 138

PATENTS - requirement to describe best method known to applicant of performing the invention - extension drilling system for use in underground mines - where specification described a sealing member but not the best sealing member known to the applicant at the relevant time - whether the specification failed to describe best method of performing the invention PATENTS - novelty - extension drilling system - where primary judge found that the claims were anticipated by the drilling system used by another company - whether the primary judge erred in so finding PATENTS - inventive step - extension drilling system - where primary judge found that the alleged invention was obvious - whether primary judge erred by relying on the evidence of an expert witness who was not a person skilled in the relevant art PATENTS - utility - claim construction - whether primary judge erred in construction of claim