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treatise covers the entire field of the patent laws of the United States, as those laws were enacted in the statutes and developed in the decisions, from the foundation of the national government in 1789, down to the first day of September, 1883. How accurately and well it covers that field, is a question which belongs to the bar and to the bench; and to the generous judgment of the bench and of the bar, I commit the result of my long and interesting labor.
A. H. W. HARTFORD, CONNECTICUT,
September 26, 1883.
TABLE OF CONTENTS.
' principle,” inquired into.
tions of matter.
23. Invention necessary to patent- ing the presence or absence of
38. Using old thing for new purpose
is not invention.
51. Joint patent to sole inventor and
another is void.
79. Perfection not necessary to util- be good, and by others to be
84. Good functions in wrong places.
solved against infringers.