Patent drafting is not listed in the help page, so does a question about drafting the belong here? Or should it be taken to Legal or English?
The question I want to ask is that, regarding a sentence saying "A includes a B, at least one C, and at least one D", if "a" and "at least one" would be taken as equivalent.
In regard to "Specific aspects or interpretations of a particular patent claim", such a question may be relevant. However, what if the sentence is not part of the claim but part of the background/summary/detailed description?
I found an answer I need at English.
I did a wild-card text search at Google Patents and it's apparent that the text pattern "comprising a A and at least one B" is fairly common.
I also downloaded bulk data between 1/5~1/19/2016 (>1GB, uncompressed) and did regular expression text search. I found many matches for the pattern "comprising/including a A... at least one B" (anywhere) and "comprising a A" (claim text only), but no match for "comprising/including one A...".
Evidently "one" should be avoided.