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. 24 shown for “Patent model with improvements on envelope-making machines” — 64 records examined, 23 dropped by the rights gate.
Archives queried 2026-09-08 10:55 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Colt Third Model Dragoon Percussion Revolver, serial no. 12406
Samuel Colt · ca. 1853
Patent model with improvements on envelope-making machines
Artist not stated in the record · August 11, 1874
Winchester Model 1886 Takedown Rifle decorated by Tiffany & Co. (serial no. 120528)
Winchester Repeating Arms Company · 1899–1900
1838 Parsons's Patent Model of a Cloth Shearing Machine
Artist not stated in the record · 1838-11-25
Pair of Forsyth Patent Third Model Sliding Primer Pistols
Alexander John Forsyth · ca. 1828
Patent model of an envelope-making machine
Artist not stated in the record · November 23, 1858
Collier Second Model Five-Shot Flintlock Revolver
Elisha Haydon Collier · ca. 1820
Patent model for paper-ruling machine
Hickok, William O. · ca 1877
Smith & Wesson .44 Double-Action Frontier Model Revolver decorated by Tiffany & Co. (serial no. 8401), with Case and Cleaning Rod
Smith & Wesson · ca. 1893
1854 - Walter Hunt's Patent Model of a Sewing Machine
Artist not stated in the record · 1854-06-27
Vase with scenes of storm on land
Dihl et Guérhard · ca. 1797–98
1850 - Frederick R. Robinson's Patent Model of a Sewing Machine
Artist not stated in the record · 1850-12-10
Watch with scenes from the story of Rebekah at the well
Johannes van Ceulen · ca. 1676–80
1838 Day's Patent Model of a Cordage Machine
Artist not stated in the record · 1838-02-07
Forsyth Patent Second Model Sliding Primer Over-and-Under Pistol with Case and Accessories
Alexander John Forsyth · ca. 1824
1852 - Otis Avery's Patent Model of a Sewing Machine
Artist not stated in the record · 1852-10-19
Madonna and Child in a niche
Luca della Robbia · ca. 1460
Sholes & Schwalbach Patent Model for Improvement in Type-Writing Machines
Artist not stated in the record · ca 1872
H-4 Artist Model Mandola (serial no. 49642)
Gibson Mandolin-Guitar Manufacturing Co., Ltd. · 1919
Howe’s Patent Model of a Pin Making Machine - ca 1841
Artist not stated in the record · ca 1841
K-4 Artist Model Mandocello (serial no. 26084)
Gibson Mandolin-Guitar Manufacturing Co., Ltd. · 1916
Lucien S. Crandall Typewriter Patent Model
Crandall, Lucien S. · 1881-12-20
Vase with scenes of storm at sea
Dihl et Guérhard · ca. 1797–98
Patent Model of a Plate-printing Machine
Bogart, Albert H. · ca 1880
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. 26 matched · 24 examined · 3 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 260 matched · 40 examined · 20 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 2026-09-08 10:55 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.