Ultra Stereo Labs had introduced a comparable stereo optical sound system, Ultra Stereo.

Entity and relation annotations:
id: 0
type: entity
value: text: Ultra Stereo Labs
labels: <Organization>
id: 1
type: entity
value: text: Ultra Stereo
labels: <Production>
type: relation
to_id: 1
labels: Organization:develops/produces/sells:Production
from_id: 0