His contract was mixed , partly of and partly for services outside the contract .
Denning LJ held the engineer simply put together his know how of the profession and had not betrayed any mystery of the firm 's business or disclosed trade secrets .
Denning LJ 's contract was mixed , partly of and partly for services outside the contract .
Denning LJ held the engineer simply put together his know how of the profession and had not betrayed any mystery of the firm 's business or disclosed trade secrets .