"signature techniques" is correct and usable in written English.
You can use it when referring to specific techniques that are associated with a particular person, company, or brand. For example: "Bob's signature techniques in the kitchen make his dishes stand out from the crowd."
In this video clip, I point out a few of Giacchino's signature techniques and tics.
THIS 1959 gem of a painting may be small -- only 10 inches by 8 inches -- but it incorporates many of Mr. Johns's signature techniques.
One of the programme's signature techniques – of using video montages showing politicians contradicting themselves – is now a staple technique of mainstream news shows.
Mr. Burns uses his signature techniques in "Mark Twain," with various actors and others supplying the voices of Twain and other characters, historians and literary figures doing analysis, and lots and lots of period photographs.
Les, a good friend of mine, is responsible for introducing the "choke tackle", which has been one of Ireland's signature techniques for a while and continues to be hugely effective.
In France there were films which leapt on to the New Wave bandwagon pretty sharpish – but as this book informs us, the magazine was scathing about film-makers who adopted the signature techniques without anything more than a superficial understanding of what inspired them in the first place.
Mr. Glass's signature technique of ravishment by repetition lends itself well to the story's dreamlike state of suspense.
Mr. Glass's signature technique of ravishment by repetition lends itself well to the story's dreamlike state of unbroken suspense.
Prince's input was simply to take and display a photograph of this photograph — a signature technique he calls "rephotographing".
His signature technique persists: tiny dollops of paint, whose culminating twists suggest chocolate chips but also thumbtacks, with their points facing out.
Adele's 60s-style eyeliner is one of the most coveted looks in pop, with hundreds of video tutorials dedicated to helping fans perfect her signature technique.
