APA (7th ed.) Citation

United States. Patent Office & Tobald, E. F. (1931). In Court of Customs and Patent Appeals, patent appeal No. 2689, in re Ewald F. Tobald, improvements in separator for valve insides; brief for Commissioner of Patents. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

United States. Patent Office and Ewald F. Tobald. In Court of Customs and Patent Appeals, Patent Appeal No. 2689, in Re Ewald F. Tobald, Improvements in Separator for Valve Insides; Brief for Commissioner of Patents. [Washington?]: U.S. Government Printing Office, 1931.

MLA (9th ed.) Citation

United States. Patent Office and Ewald F. Tobald. In Court of Customs and Patent Appeals, Patent Appeal No. 2689, in Re Ewald F. Tobald, Improvements in Separator for Valve Insides; Brief for Commissioner of Patents. U.S. Government Printing Office, 1931.