# US9488979B1 revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Patent: [US9488979B1](/patents/us9488979b1-zipline-operator-intervention.md)

## Recorded posture

- First recorded event: 2016-11-08
- Last material change: 2016-11-08
- Material event count: 1
- Editorial event count: 0

## Material events (1)

- **2016-11-08**: created (source: [{"url": "https://patents.google.com/patent/US9488979B1/en", "title": "US9488979B1 - System and method for human operator intervention in autonomous vehicle operations (Zipline International Inc; granted 2016-11-08; Google Patents)", "sourceName": "Google Patents (USPTO)"}]) (verified)

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /patents/us9488979b1-zipline-operator-intervention/history. HTML: [/patents/us9488979b1-zipline-operator-intervention/history](/patents/us9488979b1-zipline-operator-intervention/history)._