US3358299A - Maintenance of urinals, water closet basins and the like - Google PatentsUS3358299A - Maintenance of urinals, water closet basins and the like - Google Patents Maintenance of urinals, water closet basins and the like Download PDF Info Publication number US3358299A US3358299A US465133A US46513365A US3358299A US 3358299 A US3358299 A US 3358299A US 465133 A US465133 A US 465133A US 46513365 A US46513365 A US 46513365A US 3358299 A US3358299 A US 3358299A Authority US Uni
