He merely kept his trade secret, because he had to keep his tricks secret, like any other conjurer.
I cannot give you the prescription because it is a trade secret.
Where Alec was concerned, the bomb ought to remain a trade secret, so to speak.
Its composition is a trade secret, but its chief ingredient is rubber.
But whether I practice Yoga, Dianetics, or write the lines on a sugarcoated pill and swallow it is my trade secret.
To this the witness responded that the matter in question was a trade secret and must be respected as such.
But we do not keep it ourselves, nor do we know the parties who prepare it, it being something of a trade secret.
The composition of this sauce is a trade secret, but a variety of similar sauces are found on the market.
This was a wonderful discovery, and was preserved as a trade secret for a long time.
Port-Salut made by Trappist monks at Savoy from their method that is more or less a trade secret.