[Zeke]

Well, now, David, you get into the territory of a 'building engineer' in the sense of running and maintaining the equipment required to power the environment of a large building. That's what they've been called in the sense of a train engineer.

You wouldn't call out a train engineer.

I kinda go with CP and others on this one in that if you are competent enough to design something that receives a patent, you may be a designer, or in some cases, functioning as someone who engineered the item.

To reiterate the question, "Does a degree define being an engineer?" Yes in my thinking, but to sell services to the public seems to be the next hurdle, e.g., becoming licensed by the state in which you work.

I have encouraged my very smart and artistic granddaughter to study design engineering.