INTO THE

PRINCIPLES, EFFECT, AND PRESENT STATE

OF THE

AMERICAN

PATENT SYSTEM

BY

H. & C. HOWSON.

TOGETHER WITH THE

Laws of the United States Relating to Patents,
Trade-Marks and Copyrights.

PHILADELPHIA:
SHERMAN & CO., PRINTERS.

1872.

Anim

PUBLIC

THE NEW YORK PUBLIC LIBRARY 747274

ASTOR, LENOX AND TILDEN FOUNDATIONS 1917

Entered according to Act of Congress, in the year 1871,

BY H. & C. HOWSON,

In the Office of the Librarian of Congress at Washington, D. C.

6 Oct. 1016

The American patent system.-Previous official examination,

17

Laws of the United States relating to patents, trade marks