Inventor
LITTRELL ROBERT J
US27 patents
⚠️ This page may combine multiple inventors who share the name “LITTRELL ROBERT J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
QUALCOMM TECHNOLOGIES INC
11 patentsUS11899039B2Feb 13, 2024
Piezoelectric accelerometer with wake function
QUALCOMM TECHNOLOGIES INC1 citations73
US11617048B2Mar 28, 2023
Microphone having a digital output determined at different power consumption levels
QUALCOMM TECHNOLOGIES INC3 citations73
US12216746B2Feb 4, 2025
Biometric authentication using voice accelerometer
QUALCOMM TECHNOLOGIES INC2 citations65
US12010488B2Jun 11, 2024
Microphone having a digital output determined at different power consumption levels
QUALCOMM TECHNOLOGIES INC1 citations62
US11950052B2Apr 2, 2024
Acoustic transducer with gap-controlling geometry and method of manufacturing an acoustic transducer
QUALCOMM TECHNOLOGIES INC0 citations62
US11892466B2Feb 6, 2024
Piezoelectric accelerometer with wake function
QUALCOMM TECHNOLOGIES INC0 citations62
US11871664B1Jan 9, 2024
Staggering of openings in electrodes for crack mitigation
QUALCOMM TECHNOLOGIES INC0 citations62
US11726105B2Aug 15, 2023
Piezoelectric accelerometer with wake function
QUALCOMM TECHNOLOGIES INC0 citations62
US11716906B2Aug 1, 2023
MEMS process power
QUALCOMM TECHNOLOGIES INC0 citations62
US11617041B2Mar 28, 2023
Piezoelectric MEMS device for producing a signal indicative of detection of an acoustic stimulus
QUALCOMM TECHNOLOGIES INC0 citations62
US11930334B2Mar 12, 2024
Piezoelectric MEMS device with an adaptive threshold for detection of an acoustic stimulus
QUALCOMM TECHNOLOGIES INC0 citations56
VESPER TECH INC
8 patentsUS10284960B2May 7, 2019
Acoustic transducer with gap-controlling geometry and method of manufacturing an acoustic transducer
VESPER TECH INC15 citations93
US10001391B1Jun 19, 2018
Adjusting resonant frequencies based on feedback networks
VESPER TECH INC31 citations93
US10825982B1Nov 3, 2020
Piezoelectric micro-electro-mechanical systems (MEMS) device with a beam strengthening physical element
VESPER TECH INC19 citations92
US10715922B2Jul 14, 2020
Piezoelectric mems device for producing a signal indicative of detection of an acoustic stimulus
VESPER TECH INC9 citations83
US11259124B2Feb 22, 2022
Acoustic transducer with gap-controlling geometry and method of manufacturing an acoustic transducer
VESPER TECH INC1 citations72
US10771889B2Sep 8, 2020
Acoustic filtering
VESPER TECH INC2 citations72
US10566517B1Feb 18, 2020
Staggering of openings in electrodes for crack mitigation
VESPER TECH INC2 citations72
US11418882B2Aug 16, 2022
Piezoelectric MEMS device with an adaptive threshold for detection of an acoustic stimulus
VESPER TECH INC2 citations67
UNIV MICHIGAN REGENTS
6 patentsUS10964880B2Mar 30, 2021
Piezoelectric MEMS microphone
UNIV MICHIGAN REGENTS15 citations94
US10170685B2Jan 1, 2019
Piezoelectric MEMS microphone
UNIV MICHIGAN REGENTS24 citations94
US9853201B2Dec 26, 2017
Piezoelectric MEMS microphone
UNIV MICHIGAN REGENTS19 citations92
US11088315B2Aug 10, 2021
Piezoelectric MEMS microphone
UNIV MICHIGAN REGENTS5 citations84
US12058939B2Aug 6, 2024
Piezoelectric MEMS microphone
UNIV MICHIGAN REGENTS2 citations73
US11665968B2May 30, 2023
Piezoelectric MEMS microphone
UNIV MICHIGAN REGENTS1 citations73