Recent developments in the British patent classification for improved dissemination of information on uses, applications and utilities of inventions
Brotton, J. P.
Recent developments in the British patent classification for improved dissemination of information on uses, applications and utilities of inventions
Patentklassifikation
Großbritannien
Recent developments in the British patent classification for improved dissemination of information on uses, applications and utilities of inventions
Patentklassifikation
Großbritannien