A brief inquiry into the principles, effect, and present state of the American patent system
By: by H. & C. Howson. Together with the laws of the United States relating to patents, trade-marks and copyrights.
Contributors: Howson, Charles.
Publisher: Sherman & co., printers
Published: 1872
Place of publication: Philadelphia
Language: eng
Number of pages: 112
Subjects: Patent laws and legislation -- United States.; Trademarks -- United States.; Copyright -- United States.