John Y. Smith, of Pittsburg, Pennsylvania
Subtitle: improvement in steam and air car-brakes : specification forming part of letters patent no. 129,868, dated July 23, 1872
Contributors: United States. Patent Office
Publisher: United States Patent Office
Published: 1872
Place of publication: Washington?]
Language: eng
Other titles: Improvement in steam and air car-brakes
Notes: Caption title.

At head of title: United States Patent Office.

Signed: John Y. Smith. Witnesses: A. Ruppert, B. Edw. J. Eils.