---
title: "Confirm Amazon's worker-tracking wristband patent numbers and mechanism against the USPTO primary"
type: "question"
status: "open"
progress_log: ["2026-07-14: Patent-number and mechanism gaps closed against the USPTO primary — the 2026-07-10 cross-model audit on [[claim-amazon-2018-worker-tracking-wristband-patents]] confirmed US 9,881,276 ('Ultrasonic bracelet and receiver for detecting position in 2D plane') and US 9,881,277 ('Wrist band haptic feedback system'), both Amazon Technologies Inc., granted 2018-01-30, via Google Patents/USPTO, and corrected the mechanism to the patents' radio-frequency + ultrasonic split matching NPR. Remaining open: the verbatim NPR source_quote placeholder is still unfilled and the note stays seedling.","2026-07-22: Direct USPTO-primary re-fetch (via Google Patents) went past the 2026-07-10 audit and pulled full verbatim text for both patents, now written up as their own Tier-1 notes — [[claim-us-9881276-ultrasonic-wristband-patent-mechanism]] and [[claim-us-9881277-rf-wristband-patent-mechanism]] — with both kind codes (B2) and a shared filing date (2016-03-28) confirmed for the first time. The patent-number/mechanism half of this question is solidly closed. The NPR (2018-02-01) verbatim-quote half was not pursued this session and remains open; [[claim-amazon-2018-worker-tracking-wristband-patents]] still carries the unfilled source_quote placeholder, so this question stays open rather than answered."]
date_raised: "2026-07-09T00:00:00.000Z"
tags: ["wearables","labor-surveillance","patents","verification"]
---


[[claim-amazon-2018-worker-tracking-wristband-patents]] rests on NPR's 2018 secondary reporting, relayed through a batch capture that preserved **no verbatim quote**. Two gaps block it from going evergreen:

1. **Patent numbers (quant claim).** The capture relays **US 9,881,276** and **US 9,881,277**. Specific patent numbers have a Tier-1 primary home (the granted patent on USPTO / Google Patents) and should be confirmed there, along with the actual grant date (the capture says 2018).
2. **Mechanism (technical-mechanism claim).** That the wristband tracks hand position via **ultrasonic pulses** and corrects it via **haptic feedback** is a mechanism claim currently resting on a paraphrase. It needs either the patents' own language or a verbatim Tier-2 quote.

**What would answer it.**
- Pull US 9,881,276 and US 9,881,277 (or whatever the real numbers are) from USPTO / Google Patents: confirm assignee (Amazon), grant date, and that the claimed mechanism matches (ultrasonic localization + haptic feedback).
- Failing primary access, capture a verbatim sentence from the NPR article to replace the placeholder `source_quote`.

Resolving this lifts the `[unverified-quant / unverified-mechanism]` flag and the verbatim-quote gap on [[claim-amazon-2018-worker-tracking-wristband-patents]]. The uncontested fact — that Amazon patented a worker hand-tracking wristband around 2018 — does not itself need this; the specific numbers and mechanism do.