71613746
May 10, 1951
Sep 29, 1953
PHOTOSENSITIVE COATINGS FOR LITHOGRAPHIC PLATES, DEVELOPING AGENTS FOR SENSITIZED LITHOGRAPHIC PLATES ETCHING AGENTS FOR LITHOGRAPHIC PLATES, PREPARATIONS FOR INTENSIFYING THE IMAGE ON LITHOGRAPHIC PLATES, PREPARATIONS USED TO PRESERVE LITHOGRAPHIC PLATES WHEN THEY ARE NOT IN USE
Metal Goods