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Official Gazette of the United States Patent Office
1919 - Patents
Automatic machine for making cylindrical metal parts. No. 1,318,484 ... Means for broaching bushings. No. ... Dray, William J., New York, N. Y. Grate-cleaning device. No. ... Du Bois, Thomas R., assignor to U. S. Light & Heat Corporation, Niagara Falls, N. Y. Dynamo-electric machine. No. ... Ejector for printing-machines. No.













