12 books found
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59.
by Bisel, George T., co., Philadelphia, Pennsylvania
1918
by Engineers Club of Philadelphia
1918
by Philadelphia (Pa.). Board of Public Education
1918
by Philadelphia (Pa.). Mayor
1912
by Philadelphia (Pa.). Councils. Select Council
1888