The phrase "a prototype of which" is correct and usable in written English.
It can be used when referring to a specific prototype that is being discussed or described in relation to something else.
Example: "The new smartphone model is a prototype of which many features are still under development."
Alternatives: "a model of which" or "a version of which".
The wagon, a prototype of which was shown late last year, was codeveloped with Vattenfall, a Swedish energy supplier.
The Dutch, at Philips, have just finished field tests of a stainless-steel fan stove, a prototype of which I tried out this fall.
A high-definition version for personal-computers, a prototype of which was shown at E3, a video game exhibition, will reach gamers in months, he says.When the device arrives, it will be entering a buoyant market of game peripherals.
With rumors swirling about Apple's pending introduction of the iPad, H.P. and Microsoft scrambled to create a new tablet computer, a prototype of which Steven A. Ballmer, Microsoft's chief executive, showed during a keynote speech at the Consumer Electronics Show in Las Vegas on Jan . 6 , 2010
The device, a prototype of which was unveiled this week, is an emotion-sensing system designed to help investors keep a cool head when buying and selling.The idea was dreamed up by Philips, an electronics group based in the Netherlands, and the Dialogues Incubator, an initiative sponsored by ABN AMRO, a Dutch bank with intimate experience of rash decision-makers.
Its Joint High Power Solid State Laser, a prototype of which should be ready next summer, is meant to destroy rockets the size of the Katyushas used by insurgents in Afghanistan and Iraq, and by Hizbullah in Lebanon.The most ambitious laser project of all, though, is the Airborne Laser, or ABL, being developed by the American Missile Defence Agency and Boeing, Lockheed Martin and Northrop Grumman.
The drawings in the exhibit often contain striking resemblances to some of Dr. Seuss' later well-known characters, including a prototype of Yertle, which Dr. Seuss once said represented Hitler.
In addition to its use for classroom demonstrations, the Leyden jar is of importance as a prototype of capacitors, which are widely used in radios, television sets, and other electrical and electronic equipment.
For example, the A4B4 variant, (a prototype of Motavizumab, which is an in vitro affinity matured anti-RSV mAb derived from palivizumab), demonstrated broad tissue binding and accelerated clearance in vivo (Wu et al., 2007).
The Nintendo group had come to demonstrate a prototype of the Wii, which had not then been released.
A prototype of Google Health, which the company has shown to health professionals and advisers, makes the consumer focus clear.
