Patent invalidity dossiers.

Patent Overview — US 1557270 A Title: Vacuum cup for washing machines Inventor: William E. Pinckney, of Portland, Multnomah County, Oregon, a US citizen Assignee (per source): Individual (original assignee: Individual) Application No.: US…

Search Results Summary CAFC 2026 docket search: No results found for patent number 1592313 in any 2026 Federal Circuit docket. This is consistent with the patent's status — it expired by operation of law in 1943 (17-year term from issue)…

Patent Overview — US 166,113 Title: Improvement in Nut-Locks Inventor: James M. Kent, of Curtis, Steuben County, New York Patent date: July 27, 1875 Application filed: June 19, 1875 Assignee: None stated in the supplied text Source…

Patent Overview — US174931A Title: Improvement in Sectional Steam-Boilers Inventor: Valerius D. Anderson, of Springfield, Ohio Patent number: US 174,931 Dates: Application filed March 6, 1875; patent dated/issued March 21, 1876. (Google…

Patent Overview — US 175,386 Title: Improvement in Sewing-Machine Treadles Patentee: William H. Stewart, of Brooklyn, county of Kings, State of New York. No assignee is named in the supplied text. Dates: Application filed September 15…

Patent Overview: US176913A — "Improvement in Tuyeres" Title: Improvement in Tuyeres Patent number: US176913A Inventor: Thomas F. Witherbee, of Port Henry, County of Essex, New York Filed: February 28, 1876 Granted/Published: May 2, 1876…

Patent Overview: US 181,074 — Improvement in Watch-Keys Title: Improvement in Watch-Keys Patentee: William S. Hicks, of New York, N.Y. Patent Number: US 181,074 Application Filed: July 17, 1876 Date of Patent (Publication/Grant): August…

I'll search for authoritative information on this patent number. US Patent 185,309 — Verification Summary Search note: I retrieved the authoritative full text from the Google Patents "en" page for US185309…

Patent Overview — US 185,628 Title: Improvement in Combined Handle-Plate and Escutcheon for Doors Patentee: John Collins, of Darlington, township of Hohokus, county of Bergen, New Jersey. Assignee: Hopkins & Dickinson Manufacturing…

Patent Overview — US187719A Title: "Improvement in pumps for town and city supply" Inventor: William H. Lang, of Vergennes, Vermont Patent number: US187719A Publication/grant date: February 27, 1877 Application filed: January 18, 1877…

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…

Patent Overview — US 191,088 Title: Improvement in Skylight Lifter and Lock Patentee: John F. Wollensak, of Chicago, Cook County, Illinois Dates: Application filed April 23, 1877; patent granted and published May 22, 1877. The source lists…

Patent Overview — US 206,103 Title: Improvement in Buttons and Studs Patentee: Carl E. S. Gederen, of Philadelphia, Pennsylvania Patent date: July 16, 1878 Application filed: April 29, 1878 Publication number: US206103A Legal status (as…

Patent Overview — US 2069960 A Title: Apparatus for burning liquid fuel Assignee/Current Assignee (as listed): Universal Oil Burner Co. Inc. (original assignee listed as "Universal Oil Burner Co I") Inventor: Albert A. La Pointe Dates…

Patent Overview — US 213,309 Title: Improvement in Pumps Inventor: William O. Wilcox, of San Francisco, California Patent Date: March 18, 1879 Application Filed: December 19, 1877 Publication Number: US213309A Assignee: None identified in…

Patent Overview — US 214,230 Title: Improvement in Machines for Making Can-Heads Inventor: Charles P. Babcock, of Portland, Cumberland County, Maine. Dates: Application filed January 14, 1878; patent granted and published April 15, 1879…

Patent Overview — US 214,237 Title: Improvement in Grain-Driers Patentees: John G. Buhler and William B. Pye, of Chicago, Illinois Assignee (partial): Franklin S. Hanson of the same place — assignors of one-third of their right Application…

Patent Overview — US 2,152,274 Title: Stencil attachment for spray guns Inventor: Martin S. Papazian (Worcester, Mass.) Assignee: Individual (original assignee listed as Individual; no corporate assignee shown) Filing / Priority Date…

Patent Overview: US215705A Title / Inventor designation: The Google Patents page for US215705A lists the title simply as "Peters." The description field contains two distinct captions: "U. D. WOOD. Leather-Burnishing Machine." and "O. D…

Patent Overview: US 2,191,954 — "Brake" Bibliographic data (from supplied text): Title, "Brake." Inventor: Ferdinand J. Buffa, Brooklyn, N.Y. Application No. 271,787, filed May 4, 1939; patent granted and published February 27, 1940…