£3367 in 1932 and £4703 in 1933, in which year they made a profit of £18,400. The trademark design changed little from this time: "VINCENT'S" in white lettering on a blue rectangle, with "A•P•C" in white on a blue semicircle attached directly below, and "GENUINE (PINK)" in blue on a yellow semicircle attached above. Return of Dr. Vincent In 1924, Vincent returned to Sydney, having qualified as Doctor of Dental Surgery, and opened a practice in Haberfield. He was still on friendly terms with Probert, and intimated to him that he would like to rejoin the partnership, and on 8 March 1926 wrote to them with an offer, intimating that he had other products with which they could diversify, to which Delany replied on 10 March, stating that none of the shareholders was interested in his proposal, concluding ominously: "As you mention that you are desirous of putting certain new lines of chemical preparations on the Australian market, I have to remind you that perhaps the most valuable asset of the Vincent Chemical Company in this field is now its trademark ... and that it could not permit this asset to be challenged or imperilled." In September 1932, Dr. Vincent, who had invented an analgesic toothpaste, founded a company Vincent's Products, Ltd., with a nominal capital of £1000, to manufacture and market this product. Dr. Vincent was originally appointed managing director, but died shortly after, and his widow Hilda A. Vincent (née Mills) was appointed in his place. In 1934 Vincent Chemical Co. sued Vincent's Products, Ltd. for infringement of their trademark. The court upheld the complaint and issued a limited injunction against the defendant from using that name in circumstances which might lead customers to believe the companies were associated, and awarded costs against Vincent's Products, Ltd. Around 1936, Vincent's APC was first also marketed in "pocket-size" rectangular cans containing 24 tablets. Advertising slogans 1928: Take genuine Vincent's powders 1938: For safety's sake take Vincent's APC 1941: The same today as in 1917 ... Take Vincent's with confidence. 1950s: Take Vincent's with confidence for quick three-way relief Vincent's radio jingles (YouTube) late 1970s - "It's your day, don't share it with a headache! Vincents helps when you need help with pain." (sung) Phenacetin dropped At some time before 1972 Vincent Chemical Co. replaced the phenacetin in the formulation of its powders and tablets with salicylamide. Compound analgesics were banned