16th May 1949: Letter from Circuits Management Association Ltd regarding the outstanding sound quality of Sapphox. The management placed Sapphox in their Odeon cinema in Leicester Square in London. During the six month run of the film Hamlet they had used Sapphox on the two sets of records played during the interval of the film. The quality of the sound was such they were going to use Sapphox in all their cinemas as installations were made.
Marie put her British Patent up for sale to test the market and try to find out what the cause of the blockage to her business was. Pye Ltd was one of the firms who responded to the advertisement. At a meeting with her Pye stated, they had been making and marketing her invention very successfully – that they were a million air company and would come to a settlement with her. Marie informed them they would be hearing from her solicitor.