Possibly. Generally NPC owned items are those waiting to go onto the NPC market. You may be able to catch them when they go up, or you could just DM the owner once someone has bought them.
For some reason there are a veritable ton of assets that are marked as NPC-owned and they are never on the NPC market. They just perpetually sit as NPC-owned. If they're just normal items, I would suggest picking them up and using them as normal.
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I am upset things like this happen. I get upset over every godamn thing. ~ Any given SWC player on any given day.
I don't think thats possible Arete - they don't show up on the items/party screens, and they don't get assigned to you as carrier when you pick them up (which I suppose is a bug and needs reporting). The best we can do is give you the room number for you to hunt down the items id.