The Act of March 3, 1839, c. 88, § 7, authorized persons in
whose building a machine was put up by the inventor thereof, and
with his knowledge and consent, while he was in their employment,
and before his application for a patent, to continue to use the
specific machine, without paying compensation to him or his
assigns, although asked for after obtaining the patent, and is not
unconstitutional as depriving him of his property without
compensation.
This was an action for the infringement of two patents for
improvements in machinery for unloading grain from railroad cars,
issued in 1866 and 1868 to John Dable, and by him since assigned to
the plaintiff.
The defendants filed several pleas, the fourth of which
averred
"that the only machines for unloading grain from railroad cars
ever used by them during the life of either of said patents set
forth in said declaration were constructed and put into use in
their grain elevators by the said John Dable, and with his consent
and allowance, while he was in their employ as superintendent of
machinery, and prior to his application for either of said letters
patent, and thereby, and by virtue of the statute in such case made
and provided, the defendants became possessed of the right to use
all said machines during the life of each of said patents, without
liability to the said John Dable or the plaintiff."
The parties afterwards filed a stipulation in writing, by
which
Page 137 U. S. 42
they waived a trial by jury, agreed that the facts alleged in
the fourth plea were as therein stated, and also that Dable, when
he obtained each of his patents, claimed of the defendants
compensation for the use of the inventions covered thereby, and
that the defendants refused to recognize the claim, and submitted
the issue presented by the plea to the judgment of the court upon
the facts so stated and admitted.
The circuit court held that these facts constituted a good
defense to the action, and therefore entered judgment for the
defendants. 42 F. 686. The plaintiff sued out this writ of
error.
MR. JUSTICE GRAY, after stating the facts as above, delivered
the opinion of the court.
The fourth plea is based upon section 7 of the Act of March 3,
1839, c. 88, in force when the patents were granted, providing
that
"Every person or corporation who has or shall have purchased or
constructed any newly invented machine, manufacture, or composition
of matter, prior to the application by the inventor and discoverer
for a patent shall be held to possess the right to use, and vend to
others to be used, the specific machine, manufacture, or
composition of matter so made or purchased without liability
therefor to the inventor or any other person interested in such
invention."
5 Stat. 354. In the later statutes, this provision has been
reenacted with the qualification that the machine, manufacture, or
composition of matter must have been purchased from the inventor or
constructed with his knowledge and consent. Act of July 8, 1870, c.
230, § 37, 16 Stat. 203; Rev.Stat. § 4899.
It is agreed that the machines in question were constructed and
put in use in the defendants' grain elevators by the inventor
himself, and with his knowledge and consent, while he was
Page 137 U. S. 43
in their employment as superintendent of machinery, and before
his application for either patent. According to the express terms
of the statute, therefore, the defendants had the right to continue
to use these specific machines without paying any compensation to
him or his assigns, whether asked for or not.
To the argument of the plaintiff's counsel that the statute is
unconstitutional as depriving the inventor of his property without
compensation, there is a two-fold answer: the patentee has no
exclusive right of property in his invention except under and by
virtue of the statutes securing it to him and according to the
regulations and restrictions of those statutes.
Gayler v.
Wilder, 10 How. 477,
51 U. S. 493;
Brown v.
Duchesne, 19 How. 183,
60 U. S. 195;
Marsh v. Nichols, 128 U. S. 605,
128 U. S. 612,
and these machines have been set free from his monopoly by his own
act, consent, and permission,
Wade v. Metcalf,
129 U. S. 202.
Judgment affirmed.