Cross-cut: `sensor-magnetometer`

Axis: sensors

3 corpus entries disclose this tag.

Earliest disclosure: 2013-02-25

Listed in chronological order. Each entry’s prior_art_notes and disclosure_citation constitute the citeable prior art material.

Thalmic Labs Myo armband (2014) — consumer surface-EMG gesture-control armband (2013-02-25)

id: myo-armband-2014
corpus: private
form factor: armband
creator: Thalmic Labs Inc. (later North)
disclosure: Thalmic Labs Inc. ‘Myo gesture control armband’, announced February 2013, shipped 2014 — a forearm-worn band of eight medical-grade stainless-steel surface-EMG electrode segments plus a 9-axis IMU, recognizing hand and finger gestures from the forearm-muscle electrical activity and arm orientation/motion, and transmitting them over Bluetooth as input to computers/devices.
ip status: patented
sensors: sensor-emg, sensor-accelerometer, sensor-gyroscope, sensor-magnetometer
algorithms: algo-hand-gesture-emg, algo-keystroke-emg
prior art notes: Discloses a forearm-worn band with an array of eight surface-EMG electrodes plus a 9-axis IMU that recognizes hand/finger gestures from forearm-muscle EMG combined with arm motion/orientation and transmits them wirelessly as a control input. A consumer realization of the myoelectric pattern-recognition approach ([[englehart-hudgins-2003-myoelectric-control]]); anticipates EMG-gesture-armband claims combining ‘a band of surface-EMG electrodes worn around the forearm’, ‘an inertial sensor’, and ‘a classifier mapping the combined signal to a hand gesture / control command’ from 2014. Product-side anchor for the armband × EMG cross-cut (the only armband form-factor entry besides [[mass-effect-omni-tool]] and [[fallout-pip-boy]]).

id: bangle-js-2-2021
corpus: open
form factor: watch
creator: Pur3 Ltd. (Gordon Williams, Espruino)
disclosure: Espruino / Pur3 Ltd. ‘Bangle.js 2’, released 2021 — Nordic nRF52840 (ARM Cortex-M4), GPS, heart rate, 3-axis accelerometer, magnetometer, pressure sensor; 4-week battery life; JavaScript app development with web-based app loader. https://banglejs.com . Validated for step counting and heart-rate measurement in academic research (multi-subject MDPI study).
ip status: open-permissive
sensors: sensor-ppg, sensor-accelerometer, sensor-magnetometer, sensor-barometer
algorithms: algo-hr, algo-step-count, algo-activity-classification
prior art notes: Discloses an open-hardware smartwatch with PPG + IMU + magnetometer + barometer + GPS, web-loaded JavaScript apps, and 4-week battery life — validated against reference devices in peer-reviewed studies for step counting and HR. As open-source hardware released in 2021 it is unencumbered prior art against patents reciting the open-firmware-platform smartwatch with this sensor set.

id: mojo-vision-ar-contact-lens-2022
corpus: private
form factor: contact-lens
creator: Mojo Vision, Inc.
disclosure: Mojo Vision, Inc. ‘Mojo Lens’, publicly demonstrated June 2022 — a scleral contact lens with an embedded ~14k-PPI microLED display in the wearer’s central field of view, an ARM Cortex processor, eye-tracking via motion sensors, a magnetometer for gaze direction, a microwave radio for offload, and a wirelessly charged battery; rendering an AR information overlay on the cornea. (The consumer AR-glucose pivot followed; production halted c. 2023.)
ip status: patented
sensors: sensor-accelerometer, sensor-gyroscope, sensor-magnetometer
algorithms: algo-eye-gaze-tracking
prior art notes: Discloses a contact lens with an embedded microLED display in the central visual field, on-lens processing, gaze tracking via inertial/magnetic sensors, wireless RF link, and a wirelessly charged on-lens battery — i.e. an AR display contact lens worn on the cornea. Anticipates AR-contact-lens claims combining ‘a contact lens’, ‘an embedded near-eye microdisplay’, ‘on-lens processing and motion sensors for gaze’, and ‘a wireless link’ from 2022. Product-side anchor for the contact-lens × visual-display cross-cut; cf. [[rainbows-end-ar-contact-lens]] (the 2006 fictional anticipation).