The phrase "a proprietary method" is correct and usable in written English.
It can be used when referring to a specific technique or process that is owned and controlled by a particular company or individual, often implying that it is not available for public use.
Example: "The company has developed a proprietary method for improving energy efficiency in its manufacturing processes."
Alternatives: "an exclusive technique" or "a patented approach".
PadPak uses a proprietary method to crimp multiple rolls of kraft paper that can act as cushioning for shipments.
The company said it uses a proprietary method to print the photo on the case so that it resists scratching.
Together, the two have a network of about 200 coaches, all using a proprietary method developed by Mr Goldsmith.
The carbon dioxide is then separated with a proprietary method that uses low-temperature heat something readily available for free, since it is a waste product of many power plants.
Using a proprietary method of calculating home values, the Web site Zillow.com pegged the median value of a Hamptons home at $1,228,061 as of August, compared with $287,859 10 years ago, a 327percentt increase.
The carbon dioxide is then separated with a proprietary method that uses low-temperature heat — something readily available for free, since it is a waste product of many power plants.
Unfortunately, as this algorithm was a "new proprietary method", Fedele and Fath could not give me further details.
A rule-based proprietary method, developed by Merck research laboratories for internal use, known as et for enumerated torsions uses correlated torsion angles to some extent for conformational sampling [18].
Search engines use crawlers, programs that explore the Web by following hypertext links from page to page, recording everything on a page (known as caching), or parts of a page, together with some proprietary method of labeling content in order to build weighted indexes.
Using a proprietary new method, they were able to overcome the heat sensitivity of plastic by significantly lowering the temperature in the manufacturing process.
Considering the severe thermal runaway problem, a proprietary fabrication method combing the in-situ preparation with 3D printing bulk polymerization technique was also innovated and bulk products with different filler loading were successfully fabricated.
