7978224HEATH J.S.R. : Specific terms.Filed patent 2 Nov 1933 - @ Melbourne [ VIC Australia ]0public2018-12-07 11:57:422021-06-29 08:02:2020Sealing time extended.
The patent was 'in respect of a tooth paste which the inventor claimed contained a coloring agent which disclosed film on the teeth by producing a blue-colored substance.'1933-11-024280610HEATH, JOHN SAMUEL ROBERT6481553225Melbourne -- VIC, Australia5221"A TOOTH PASTE PATENT." The Age (Melbourne, Vic. : 1854 - 1954) 2 November 1933: 11. Web. 7 Dec 2018 <http://nla.gov.au/nla.news-article203348475>.4280610HEATH, JOHN SAMUEL ROBERT
1125https://heurist-usyd.cloud.edu.au/heurist/ExpertNationEventlet1125-241