OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 12 shown for “Doble Water Wheel, Patent Model” — 40 records examined, 19 dropped by the rights gate.
Archives queried 2026-08-31 09:01 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Doble Water Wheel, Patent Model
Artist not stated in the record · 1899
Brooks Water Wheel, Patent Model
Artist not stated in the record · 1880
Patent Model for a Feathering Paddle Wheel, 1877
Artist not stated in the record · 1877
Water Motor, Patent Model
Artist not stated in the record · 1879
Patent Model, Tug for Towing Canal Boats
Artist not stated in the record · 1871
John Haworth Hydraulic Turbine, 1878, Patent Model
Haworth, John · 1878
Patent Model, Life Boat
Artist not stated in the record · 1879
Pitts’ and Gluyas’ Patent Model of a Steam Condenser – ca 1872
Artist not stated in the record · 1872
Screw Propeller, Patent Model
Artist not stated in the record · 1875
1838 - Hiram F. Wheeler's Patent Model of a Spinning Wheel
Artist not stated in the record · 1838-04-25
Robinson and Gresham Injector, Patent Model
Artist not stated in the record · 1866
Geared Steering Wheel, Patent Model
Artist not stated in the record · ca 1875
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. The archive returned no records for this term.0 matched - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 75351 matched · 40 examined · 19 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-08-31 09:01 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.