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IV. ALPHABETICAL LIST OF EXPIRED PATENTS.

V. CLASSIFIED LIST OF PATENTS ISSUED.

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MAY 3, 1852.-Laid upon the table and ordered to be printed.

August 30, 1852.-Ordered that 50,000 extra copies be printed. August 31, 1852.-Ordered that 10,000 extra copies be printed for the use of the Patent Office.

UNITED STATES PATENT OFFICE,

March 13, 1852. Sir: I have the honor of transmitting to you, with the view of its being laid before Congress, that. portion of the Report of this Office for the year 1851 which relates to Arts and Manufactures. Its presentation has been delayed for the completion of a Report on the World's Exposition, by Mr. Riddle, commissioner from the United States, which it was desirable to include.

The second or Agricultural section of the Report will shortly be submitted. Very respectfully, your obedient servant,

THOMAS EWBANK. Hon. LINN BOYD,

Speaker of the House of Representatives.

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