"we inquired about" is correct and usable in written English.
You can use it when you want to indicate that a group of people asked about something. For example: "We inquired about the availability of tickets for the concert, but found that all the seats had been sold."
A number of properties were leased shortly after we inquired about them.
Not long after, when we inquired about a good place for lunch, Ms. Baumberger offered us some locally produced pulled pork that they were serving the students.
Slightly dazed by the interminable pageant, and miffed by the amount of Broadway insiders who sniffed at us when we inquired about who was who, we headed to the official afterparty at the Plaza Hotel.
We inquired about the war, from which, according to the British Who's Who, Mr. Fleming emerged a naval commander, and he said, "I was personal assistant to the Director of Naval Intelligence, so I went everywhere".
When he stopped at ours, we inquired about the history of the Arch, and learned that he has owned the business since 1965 but moved it from North Salem to Brewster in 1977.
"When we were looking for someone to give us something different and make us less predictable, we inquired about him but Crewe wouldn't sell because they said there was some kind of gentleman's agreement with Liverpool, whereby they'd be the only Premier League club he'd go to.
We inquired about their child-care use, satisfaction with care, work stress, and employment history.
Several days after we inquired about them, a similar statement on AOL's ad sales Web site disappeared.
We inquired about intraoperative and postoperative experiences and studied the relationship between various surgical experiences and currently meeting the diagnosis of PTSD.
For those who use graphical representations, we inquired about the approaches used to make graphical representations accessible to visually impaired learners.
