United States. Patent Office & Prawalsky, F. P. (1928). In Court of Appeals of D.C., Oct. term, 1928, patent appeal No. 2256, in re Frederick P. Prawalsky, window operated screens for automobiles; brief for Commissioner of Patents. U.S. Government Printing Office.
Chicago Style (17th ed.) CitationUnited States. Patent Office and Frederick P. Prawalsky. In Court of Appeals of D.C., Oct. Term, 1928, Patent Appeal No. 2256, in Re Frederick P. Prawalsky, Window Operated Screens for Automobiles; Brief for Commissioner of Patents. [Washington?]: U.S. Government Printing Office, 1928.
MLA (9th ed.) CitationUnited States. Patent Office and Frederick P. Prawalsky. In Court of Appeals of D.C., Oct. Term, 1928, Patent Appeal No. 2256, in Re Frederick P. Prawalsky, Window Operated Screens for Automobiles; Brief for Commissioner of Patents. U.S. Government Printing Office, 1928.