Invalidity dossier
US 189679
Improvement in seeding-machines
Added 9/23/2026, 2:41:55 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 189,679
Title: Improvement in Seeding-Machines
Patentee: John C. Baker, of Mechanicsburg, Champaign County, Ohio
Patent number: US 189,679
Granted: April 17, 1877
Application filed: April 5, 1875
Publication date: 1877-04-17
Status listed: Expired – Lifetime (anticipated expiration 1894-04-17 per the source page)
Assignee: The supplied text does not name an assignee. The specification identifies only the inventor, John C. Baker.
Purpose. The invention relates to seeding machines in which a series of drag-bars or beams are hinged at their forward ends in a straight row to the front of a wheeled frame. The machine is generally conventional: a frame on two wheels, with hoes (drill-teeth) on drag-bars, a grain-hopper on the rear of the frame, and feeding devices delivering grain from hopper to furrows.
Plain-language scope. The stated improvements are three: (1) forming the frame from a single bar of wood bent into a U shape so the front is perfectly straight between sharp corner bends, allowing the entire row of drag-bars to attach directly in a straight line; (2) a novel lever arrangement for controlling the rate of feed; and (3) a novel combination of the hoe-raising/lowering lever with the mechanism that throws the feeding devices into and out of gear. Related features described include pendant clearer-arms (G) hung on a cross-bar (H) on pivoted arms (I), raised at intervals by a cam (K) on the main axle, with sharpened rear edges to sever weeds; a loose feed-roll mounting on shaft (Q), held by a pin secured by the cup; and a pivoted rack-bar (P) carrying a feed-operating pinion, passed through the hand-lever so hoes and feeders act simultaneously.
Source: https://patents.google.com/patent/[US189679](/patent/US189679)/en
What the excerpt does not establish. It provides no claims text (only an abridged description), no drawing detail beyond references, no assignee or ownership information, and no evidence on validity, enforceability, or prior art beyond the inventor's own 1874 patent mentioned by reference.
Generated 10/1/2026, 9:52:03 PM
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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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