Lost an Item Found a Similar One

If one lost an item and found a similar one in the place where he lost it but is unsure whether it is his, he may take it and wait to see if someone comes looking for the item. If no one is searching for this type of item after enough time passes that the owner could have become aware of his loss, we assume this item is definitely the one the finder lost (שו''ת מנחת יצחק ח''ג סי' י''ז ).