Old Hungarian Classification
Old Hungarian Classification
21 classes were applied to the patents in Hungary before 1895. After 1895 these 21 classes became main classes with 158 subclasses - which were actually in use until 1949.
Old Hungarian Classification
21 classes were applied to the patents in Hungary before 1895. After 1895 these 21 classes became main classes with 158 subclasses - which were actually in use until 1949.