General index of the Official gazette and monthly volumes of patents.
APA Citation
United States. Patent Office. (18721875). General index of the Official gazette and monthly volumes of patents. Washington: U.S. Govt. Print. Off.; For sale by the Supt. of Docs., U.S. Govt. Print Off..
MLA Citation
United States. Patent Office. General Index of the Official Gazette And Monthly Volumes of Patents. Washington: U.S. Govt. Print. Off.; For sale by the Supt. of Docs., U.S. Govt. Print Off., 18721875.
Warning: These citations may not always be complete (especially for serials).