Forgive my longwinded reply, but it's my propensity.
Shipchief is right. If you read George's site completely, which will take some time, or peruse his CD, he says over and over that there are many manufacturers/assemblers of these engines in India. Some are literally back alley operations and others are first rate. When one engine assembler/seller gets flaky with quality or fails to live up to the agreement, he's toast. He and Joel recently said "So long, and thanks for all the fish" to Ashwamegh. The engines are certainly made to contract specifications. George says as much on his website. When the manufacturer no longer meets those specs, he's history.
Apparently George and Joel once imported and sold Metro/Metex, and if you look at the pics on the website, those are the engines that apparently had some of the greatest problems at that time. Ashwamegh recently met the same fate. Just like taxis, there's always another one just around the corner. Some are clean, and others smell like vomit. These engines are commodities. They're so generic, and parts are so interchangeable, competition among the various suppliers and assemblers must be fierce.
From the comments I'm reading it appears that the assumption being made is that there are several engine manufacturers making these engines in India. I think "assemblers" is a better word to use. Just as PC parts in the US are available from many sources, so are the components for Listeroids. Just like computer manufacturers do, somebody buys all these parts and assembles them, and somebody else exports them. It's not like a Ford, where you'll see FORD stickers on all the parts of the car. Remember when the media breathlessly broke the story that the Mercury Mountaineer was found to have FORD stamped on the valve covers, and what a ruckus that caused? Lawsuits were flying! We in the West clearly have different expectations.
For example, my Ashwamegh 6/1 has a crankcase casting bearing one manufacturer's stamp, the cylinder another's, the head another's, the timing gears say "Swastik," the connecting rod has a swastika cast into it (probably same company), the bearings say Asiatic, and somebody else made the beautifully machined piston and cylinder sleeve. Those were both absolutely top quality parts, by the way. Who knows who made the crankshaft? Then, take my flywheels...PLEASE! Then you look at what's cast into the crankcase cover plates and engine ID plate, and it says Vijay Engineeriing (probably the assembler), and then after it was painted, somebody stuck "Ashwamegh" stickers all over it. Go figure.
So Bruce, the answer to the question, "Did your company build the engine" sort of has to be qualified. By "build" if you mean "manufactured" then the answer is probably "no." If you mean "assembled" then probably "yes," but that's not what you asked. I don't think anyone is being coy with you, it's just when you ask that question from a Western frame of reference of someone in India, or even someone selling an Indian product, he might have a difficult time comprehending precisely what it is you are _really_ asking.
Quinn