Index to patent classification in the German Federal Republic
Subtitle: an alphabetical index, by key-words, of subject matter pertaining to useful arts with the relevant patent classes, [subclasses], groups and subgroups
By: compiled by the Patent Office of the German Federal Republic ; translated from German and rearranged in accordance with the English alphabet.
Edition: 5th ed.
Publisher: Israel Program for Scientific Translations
Published: 1966
Place of publication: Jerusalem
Language: eng
Notes: Originally published in German: München: Nauck, 1951.