Invalidity dossier
US 249095
Added 9/21/2026, 10:46:54 AM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US 249,095 — "Scaffold-Trestle"
Title: Scaffold-Trestle
Patent number: US249095A
Inventors: Thomas S. Reyburn, of Kansas City, Missouri (Jackson County), and Jerome B. Sweetland, of Pontiac, Michigan (Oakland County)
Filed: July 14, 1881 (application; "No model")
Granted/Published: November 1, 1881
Assignee: None stated in the supplied text
Classification (per source): B25H1/06 — work benches or portable stands of trestle type
Legal status (per source): Expired — Lifetime; anticipated expiration 1898-11-01
Source: https://patents.google.com/patent/[US249095](/patent/US249095)/en
Purpose. The specification describes improvements in "scaffolding benches or trestles for masons and builders" intended for brick-layers, masons, and others. The stated object is a trestle that can be folded for storage and transportation and held in that folded position while being lowered or elevated through a building.
Plain-language scope. The single claim covers a folding scaffold or trestle with two sections. Each section carries diagonal strengthening braces and battens attached to its legs. The sections are hinged together at their top. Stop cords or ropes retain the sections in a set (open) position.
Structure as described. Legs (A) attach at their upper ends to horizontal beams (B), braced by braces (c). Hinges (D) join the upper leg ends so the parts may fold together for packing, transportation, or handling, or be set apart for use. Two ropes (E) pass through apertures in the legs; they are knotted at their extremities at one side and knotted at a point permitting the legs to open sufficiently for the trestle to stand. The rope extensions beyond the latter knots serve as a handle for lowering or elevating the trestle, the legs being automatically drawn together so it can pass between joists or other narrow spaces. Blocks (F) on the outside of the lower leg ends act, when trestles are packed together, as battens holding the legs against swinging on their hinges and also prevent the legs from splitting lengthwise. Figure 1 is a perspective view; Figure 2 an end elevation.
What this excerpt does not establish. It does not identify an assignee, any ownership transfer, or litigation. It does not state validity, and the "Expired" status is expressly flagged in the source as an assumption, not a legal conclusion. The listed "Cited By" and "Similar Documents" are bibliographic entries only; the excerpt provides no analysis of them, and nothing here is a prior-art or patentability determination. Drawing images and the original PDF were not accessible in this excerpt, so details shown only in the figures are unverified.
Generated 10/1/2026, 10:01:09 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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