E.M.I. Responded to the advert for sale of the patent. On learning that it was Patent 603606, they told her that the patent had lapsed in October 1949. Marie applies to have the patent restored – claiming her patent agent Gill Jennings & Every had neglected to pay the fees. They also neglected to pay the fees for her other patents granted in other countries.

5th December: Claiming that her patent agent neglected to pay the renewal fees, Marie applies to have British Patent 603606 restored.