Invalidity dossier
US 1313290
Ckarles h
Added 9/24/2026, 12:49:15 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 1313290
Title as listed: The Google Patents page heading reads "Ckarles h," which appears to be a corrupted rendering; the specification itself titles the invention "TOY AEROPLANE."
Inventor: Charles H. Grant, of New York, N.Y.
Dates: Application filed March 21, 1919 (Serial No. 284,161); patent granted and published August 19, 1919; anticipated expiration August 19, 1936. Status listed as "Expired – Lifetime."
Assignee: None stated in the supplied text.
Classification: A63H29/18 — drive mechanisms with extensible rubber bands (toys).
Purpose: A toy aeroplane whose propeller is rotated by the torsional force of a twisted rubber band. Stated objects: (1) conceal the rubber band while keeping it accessible for placement/replacement; (2) arrange skids so the device rises into flight from a standing position, the rear skid doubling as a band hook; (3) provide a durable bearing surface for the propeller shaft; (4) flexibly and adjustably attach the main supporting plane.
Plain-language scope (four claims):
- A hollow body open at the bottom, supporting planes, a front-mounted propeller, and a rubber band motor inside the body, detachably connected to the propeller and insertible/removable through the bottom opening.
- As above, with a propeller shaft ending in an interior hook, a hook-shaped member secured to the rear of the body projecting inward, and a rubber band with a shackle at each end detachably engaging both hooks.
- Adds front skids below and ahead of the propeller as a guard, plus the rear hook-shaped member and detachable band.
- A body whose forward portion slants upward to place the propeller's rotation axis approximately on the line of the center of resistance, with a stepped shoulder on its upper surface; the plane's front edge abuts the shoulder and is flexibly bound by a rubber band wrapped around plane and body.
Source: https://patents.google.com/patent/US1313290/en
What the excerpt does not establish: the mangled heading "Ckarles h"; text between claims 2 and 3 is garbled/truncated, so claim 3's opening words are incomplete; no assignee, inventor citizenship beyond the U.S., or drawing details are verifiable here.
Generated 10/1/2026, 9:31:45 PM
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Litigation summary
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Proceedings on file (0)
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PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
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Obviousness
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Extensions
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Derivative works
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