Assertion: detector's technology | /r/HasProperty | developed in 1930
Facets:
value: by victor vacquier of gulf oil
type: OTHER
value: for finding ore deposits
type: PURPOSE
Source sentences:
text: Magnetic anomaly detectors employed to detect submarines during World War II harnessed the fluxgate magnetometer, an inexpensive and easy to use technology developed in the 1930s by Victor Vacquier of Gulf Oil for finding ore deposits.