The phrase "a prototype at the" is correct and usable in written English.
It can be used when referring to a specific prototype in a particular context or location, often in discussions about design, development, or testing.
Example: "We are currently evaluating a prototype at the research facility to assess its performance."
Alternatives: "a model at the" or "a sample at the".
The two showed off a prototype at the Los Angeles Auto Show in November.
Three months later, Mr. Duany got a chance to display a prototype at the International Builders Showw in Orlando, Fla.
Broan displayed a prototype at the show that hangs over an island, spreading and retracting its "wings" at the push of a button.
We are building a prototype at the evacuation facility in the city of Kanuma to show to the authorities and evacuees on March 24.
The company is working on a prototype at the Glenturret distillery in Perthshire, in central Scotland — one of the oldest distilleries in the country.
Here in the sunny high desert the other day, I was sitting inside a prototype at the other end of the consumer air-transportation scale, the spiffy Eclipse 500 personal jet.
Metaio cautioned that Thermal Touch is just a prototype at this point, and that the technology is probably still five to ten years away, when even more advanced sensors will be available to augmented reality developers.
Mitto is only a prototype at his point, with the Berlin-based startup behind the design in the process of raising crowdfunds on Kickstarter to get their reworked kettle to market next year, with an estimated shipping schedule of April 2016.
The device, which debuted as a prototype at SXSW earlier this year, is now the subject of a crowdfunding campaign.
A spokesman for the company said it would be a waste of time to have a review without a prototype at Swansea Bay going ahead in the meantime.
He told the Commons the work was being carried out after "low levels of radioactivity were detected in a prototype core" at the Naval Reactor Test Establishment at Dounreay, Caithness, in 2012.
