The phrase "a very proprietary" is correct and usable in written English.
It can be used to describe something that is highly exclusive or owned by a specific individual or company, often referring to information, technology, or methods.
Example: "The software we developed is a very proprietary solution that sets us apart from our competitors."
Alternatives: "highly exclusive" or "extremely owned".
"We used to use research in a very proprietary way, but it became clear advertisers were hungry for our insights," said Philippe Dauman, Viacom's president and chief executive.
"He certainly had a very proprietary sense of the job and his role in government, and that was often a great motivator to get things done, and sometimes it was a distraction," added Mr. Celli, who was appointed by Lt. Gov. David A. Paterson, a Democrat, when Mr. Paterson was Senate minority leader.
Company spokesperson Hannah Burns says: "Clearing is a very, very proprietary business for us, and we don't want the public knowing about it".
P&G has a very legitimate proprietary interest in these clinical trial data.
"She was very involved in the process and that she had a very strong proprietary sense of how John Edwards was going to be presented," he said.
One of my favorite stories I wrote was about three middle-aged Jewish guys in Detroit who'd grown up with the Tigers and were still insanely passionate Tigers fans and felt a very strong proprietary involvement.
Before the iPhone, I had a Motorola RAZR running Verizon's piece of shit very proprietary (and very red) software.
Some of this data is public, some very proprietary to drug companies, and some very private to a patient.
Flash is one of those very useful, very closed, very proprietary non-weblike things that has great tools and serves a need very well.
Armen Keteyian, the narrator and co-writer of CBS's version of the Tour, in a telephone interview from Cauteret, France, said: "With due respect to Outdoor Life, we feel very proprietary toward this.
"To date this stuff has been very proprietary.
