Powers Regulator Company (New York, N.Y.), 1937- Box 231, Folder 2866 Bookmark Abstract Or Scope Power mixing valves, tank regulators, etc. view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Powers-Weightman-Rosengarten Company (Philadelphia, Pa.), 1916- Box 231, Folder 2867 Bookmark Abstract Or Scope Chemicals, etc. view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Practical Novelty Company (Philadelphia, Pa.), 1902- Box 231, Folder 2868 Bookmark Abstract Or Scope Coat hangers, etc. view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Prairie State Incubator Company (Homer City, Pa.), 1906-1918 Box 231, Folder 2869 Bookmark Abstract Or Scope Incubators and brooders view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Prairie State Products Company (Chicago, Ill.), undated Box 231, Folder 2870 Bookmark Abstract Or Scope Accident prevention signs view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Prang Educational Company (Boston, Mass.), 1884- Box 231, Folder 2871 Bookmark Abstract Or Scope Physical and chemical apparatus view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Pratt and Cady Company, Inc. (Hartford, Conn.), 1914-1919 Box 231, Folder 2874-2875 Bookmark Abstract Or Scope Boiler room appliances and safety devices view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Pratt and Gray Company (Norwalk, Conn.), 1943- Box 231, Folder 2876 Bookmark Abstract Or Scope Microfilm camera view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Pratt and Lambert (New York, N.Y., Chicago, Ill.), undated Box 231, Folder 2877 Bookmark Abstract Or Scope Paints and varnishes, etc. view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P
Pratt and Wentworth (Boston, Mass.), 1867- Box 231, Folder 2878 Bookmark Abstract Or Scope Stoves view more view less Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978P