William H. Ukers (author)
- P.H. Vanderweyde granted united states patents on percolator and continuous coffee-filtering machine 1866
P.H. Vanderweyde, of Philadelphia, was granted United States patents in 1866 on a percolator and a continuous coffee-filtering machine
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage: 'P.H. Vanderweyde, of Philadelphia, was granted United States patents in 1866 on a percolator and a continuous coffee-filtering machine.' All elements (subject, predicate, object, and time) match exactly with no rewording or outside knowledge required.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to the author (not a named source), the stance is appropriately 'asserts' for a factual statement, sentiment is neutral as befits a historical patent record, the time is accurate (1866), context is empty as the passage provides none restricting the sense, and the quote appears verbatim in the passage and directly supports the claim.