There are many ideas in this book which are, to the best of my knowledge, original with me.
A favorite technique, original with him, he called "word-count."
I do not know whether this would now be taught in the schools of Oxford, and was original with him or not.
All examples are from the internet. There is a similar discussion on WordReference.com
Since Merriam-Webster doesn't mention this type of use, I'd like to ask about it here. The meaning, as I get it, credits the item/knowledge to a certain owner/producer ("me," "him" in the example).
However, I'm curious if this structure is widely accepted or is regional. Most sources where I've seen this phrase are AmE. Is it slang or a new norm?