I would say that your definition is a little too strict. There are devices which rest on the top of the larynx (Laryngeal Mask Airway or LMA). These devices are

I would say that your definition is a little too strict. There are devices which rest on the top of the larynx (Laryngeal Mask Airway or LMA). These devices are not within the trachea but can only be used in those under a general anaesthetic and such are usually involved in the category invasive. In essence, the main difference is invasive requires sedation (or the patient has a tracheostomy which is a bit of a edge case)