[William Wheeler Hubbell, authorized to apply for patents.]

by United States. Congress. Senate. Committee on Patents

Private patent extensions

by United States. Congress. Senate. Committee on the Judiciary

Patent Extension

by United States. Congress. House. Committee on the Judiciary. Subcommittee No. 3

Interim patent extensions

by United States. Congress. House. Committee on the Judiciary. Subcommittee on Intellectual Property and Judicial Administration.

John Moore & Co.'s illustrated catalogue of latest improved ...

by John Moore & Co

Patent-term extension and the pharmaceutical industry.

Patent extension

by United States. Congress. House. Committee on the Judiciary. Subcommittee No. 3

Patent extension hearing

by United States. Congress. Senate. Committee on the Judiciary. Subcommittee on Patents, Copyrights, and Trademarks.

Illustrated catalogue of latest improved patent extension co...

by Jonh Moore & Co

[Extension of patents.]

Patent extension hearing

by United States

Interim patent extensions

by United States

Patent extension

by United States. Congress. Senate. Committee on the Judiciary

Patent-term extension and the pharmaceutical industry

[Extension of patents.]

Extension of the Goodyear patent

by United States. Patent office, YA Pamphlet Collection (Library of Congress)

Extension of letters patent

by Joseph R. Edson

Extension of patent to DeWitt C. Cumings

by United States. Congress. House. Committee on Patents

Extension of Letters Patent.

A summary of the law of patents and of extension of patents

by Charles F. F. Wordsworth