Robert J. Littrell

Person

Boston, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Biometric authentication using voice accelerometer
- Patent number 12,216,746
- Issue date Feb 4, 2025
- QUALCOMM Technologies, Inc.
- Robert J. Littrell
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Piezoelectric MEMS microphone
- Patent number 12,058,939
- Issue date Aug 6, 2024
- The Regents of the University of Michigan
- Karl Grosh
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Microphone having a digital output determined at different power co...
- Patent number 12,010,488
- Issue date Jun 11, 2024
- QUALCOMM Technologies, Inc.
- Robert J. Littrell
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Acoustic transducer with gap-controlling geometry and method of man...
- Patent number 11,950,052
- Issue date Apr 2, 2024
- QUALCOMM Technologies, Inc.
- Karl Grosh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Piezoelectric MEMS device with an adaptive threshold for detection...
- Patent number 11,930,334
- Issue date Mar 12, 2024
- QUALCOMM Technologies, Inc.
- Robert J. Littrell
- G01 - MEASURING TESTING
Information Patent Grant
Piezoelectric accelerometer with wake function
- Patent number 11,899,039
- Issue date Feb 13, 2024
- QUALCOMM Technologies, Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Piezoelectric accelerometer with wake function
- Patent number 11,892,466
- Issue date Feb 6, 2024
- QUALCOMM Technologies, Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Staggering of openings in electrodes for crack mitigation
- Patent number 11,871,664
- Issue date Jan 9, 2024
- QUALCOMM Technologies, Inc.
- Robert J. Littrell
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Transducer system with configurable acoustic overload point
- Patent number 11,800,299
- Issue date Oct 24, 2023
- QUALCOMM Technologies, Inc.
- Robert Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Piezoelectric accelerometer with wake function
- Patent number 11,726,105
- Issue date Aug 15, 2023
- QUALCOMM Incorporated
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
MEMS process power
- Patent number 11,716,906
- Issue date Aug 1, 2023
- QUALCOMM Technologies, Inc.
- Robert J. Littrell
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Robust MEMS microphone
- Patent number 11,696,078
- Issue date Jul 4, 2023
- QUALCOMM Incorporated
- Craig Core
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Piezoelectric MEMS microphone
- Patent number 11,665,968
- Issue date May 30, 2023
- The Regents of the University of Michigan
- Karl Grosh
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Piezoelectric MEMS device for producing a signal indicative of dete...
- Patent number 11,617,041
- Issue date Mar 28, 2023
- QUALCOMM Incorporated
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Microphone having a digital output determined at different power co...
- Patent number 11,617,048
- Issue date Mar 28, 2023
- QUALCOMM Incorporated
- Robert J. Littrell
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Robust MEMS microphone
- Patent number 11,438,706
- Issue date Sep 6, 2022
- Vesper Technologies Inc.
- Craig Core
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Piezoelectric MEMS device with an adaptive threshold for detection...
- Patent number 11,418,882
- Issue date Aug 16, 2022
- Vesper Technologies Inc.
- Robert J. Littrell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Transducer system with configurable acoustic overload point
- Patent number 11,363,387
- Issue date Jun 14, 2022
- Vesper Technologies, Inc.
- Robert Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Acoustic transducer with gap-controlling geometry and method of man...
- Patent number 11,259,124
- Issue date Feb 22, 2022
- Vesper Technologies Inc.
- Karl Grosh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
MEMS process power
- Patent number 11,217,741
- Issue date Jan 4, 2022
- Vesper Technologies Inc.
- Robert Littrell
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Acoustic sensor with temperature structure
- Patent number 11,099,078
- Issue date Aug 24, 2021
- Vesper Technologies, Inc.
- Robert Littrell
- G01 - MEASURING TESTING
Information Patent Grant
Piezoelectric MEMS microphone
- Patent number 11,088,315
- Issue date Aug 10, 2021
- The Regents of the University of Michigan
- Karl Grosh
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Piezoelectric MEMS microphone
- Patent number 10,964,880
- Issue date Mar 30, 2021
- The Regents of the University of Michigan
- Karl Grosh
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Grant
Transducer system with configurable acoustic overload point
- Patent number 10,917,727
- Issue date Feb 9, 2021
- Vesper Technologies, Inc.
- Robert Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Piezoelectric micro-electro-mechanical systems (MEMS) device with a...
- Patent number 10,825,982
- Issue date Nov 3, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Acoustic filtering
- Patent number 10,771,889
- Issue date Sep 8, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Piezoelectric mems device for producing a signal indicative of dete...
- Patent number 10,715,922
- Issue date Jul 14, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Staggering of openings in electrodes for crack mitigation
- Patent number 10,566,517
- Issue date Feb 18, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
Information Patent Grant
Acoustic transducer with gap-controlling geometry and method of man...
- Patent number 10,284,960
- Issue date May 7, 2019
- Vesper Technologies Inc.
- Karl Grosh
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Piezoelectric MEMS microphone
- Patent number 10,170,685
- Issue date Jan 1, 2019
- The Regents of the University of Michigan
- Karl Grosh
- B81 - MICRO-STRUCTURAL TECHNOLOGY

Patents Applicationslast 30 patents

Information Patent Application
BONE CONDUCTION MICROPHONE WITH RESONANCE CONTROL BASED ON DETERMIN...
- Publication number 20250142250
- Publication date May 1, 2025
- QUALCOMM Incorporated
- Chun Kun KIM
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
PIEZOELECTRIC VOICE ACCELEROMETER WITH BACK CAVITY AIR PRESSURE COU...
- Publication number 20250097630
- Publication date Mar 20, 2025
- QUALCOMM Incorporated
- Shuwan XUE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PIEZOELECTRIC MEMS CONTACT DETECTION SYSTEM
- Publication number 20250056164
- Publication date Feb 13, 2025
- QUALCOMM TECHNOLOGIES, INC.
- Robert John LITTRELL
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
VOLTAGE DETECTOR IN DATA COMMUNICATION INTERFACE
- Publication number 20250028341
- Publication date Jan 23, 2025
- QUALCOMM Incorporated
- Bengt Stefan GUSTAVSSON
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
PIEZOELECTRIC MEMS CONTACT DETECTION SYSTEM
- Publication number 20240295580
- Publication date Sep 5, 2024
- QUALCOMM Incorporated
- Robert John LITTRELL
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PIEZOELECTRIC MICROELECTROMECHANICAL SYSTEM (MEMS) SIGNAL PROCESSIN...
- Publication number 20240298108
- Publication date Sep 5, 2024
- QUALCOMM Incorporated
- Robert John LITTRELL
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
LOW NOISE PIEZOELECTRIC SENSORS
- Publication number 20230422624
- Publication date Dec 28, 2023
- QUALCOMM TECHNOLOGIES, INC.
- Robert John LITTRELL
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MEMS PROCESS POWER
- Publication number 20230422623
- Publication date Dec 28, 2023
- QUALCOMM TECHNOLOGIES INC.
- Robert John LITTRELL
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
PIEZOELECTRIC MEMS MICROPHONE
- Publication number 20230337544
- Publication date Oct 19, 2023
- The Regents of the University of Michigan
- Karl Grosh
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
MICROPHONE HAVING A DIGITAL OUTPUT DETERMINED AT DIFFERENT POWER CO...
- Publication number 20230308819
- Publication date Sep 28, 2023
- QUALCOMM TECHNOLOGIES INC.
- Robert J. LITTRELL
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
PIEZOELECTRIC MEMS DEVICE FOR PRODUCING A SIGNAL INDICATIVE OF DETE...
- Publication number 20230308808
- Publication date Sep 28, 2023
- Robert John LITTRELL
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PIEZOELECTRIC MICROMACHINED ULTRASONIC TRANSDUCER (PMUT) DESIGN
- Publication number 20230270012
- Publication date Aug 24, 2023
- QUALCOMM TECHNOLOGIES, INC.
- Robert John LITTRELL
Information Patent Application
PIEZOELECTRIC MICROMACHINED ULTRASONIC TRANSDUCER (PMUT) DESIGN
- Publication number 20230270011
- Publication date Aug 24, 2023
- QUALCOMM TECHNOLOGIES, INC.
- Robert John LITTRELL
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
ACOUSTIC TRANSDUCER WITH IMPROVED LOW-FREQUENCY RESPONSE
- Publication number 20230143656
- Publication date May 11, 2023
- QUALCOMM TECHNOLOGIES, INC.
- Robert John LITTRELL
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
PIEZOELECTRIC MEMS DEVICE WITH AN ADAPTIVE THRESHOLD FOR DETECTION...
- Publication number 20220394384
- Publication date Dec 8, 2022
- Vesper Technologies Inc.
- Robert J. Littrell
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
ROBUST MEMS MICROPHONE
- Publication number 20220369043
- Publication date Nov 17, 2022
- Vesper Technologies Inc.
- Craig Core
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
Piezoelectric Accelerometer with Wake Function
- Publication number 20220344571
- Publication date Oct 27, 2022
- Vesper Technologies Inc.
- Robert J. Littrell
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
Piezoelectric Accelerometer with Wake Function
- Publication number 20220317148
- Publication date Oct 6, 2022
- Vesper Technologies Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Piezoelectric Accelerometer with Wake Function
- Publication number 20220308084
- Publication date Sep 29, 2022
- Vesper Technologies Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSDUCER SYSTEM WITH CONFIGURABLE ACOUSTIC OVERLOAD POINT
- Publication number 20220279286
- Publication date Sep 1, 2022
- Vesper Technologies, Inc.
- Robert Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Acoustic Transducer with Gap-Controlling Geometry and Method of Man...
- Publication number 20220248145
- Publication date Aug 4, 2022
- Vesper Technologies Inc.
- Karl Grosh
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
MEMS PROCESS POWER
- Publication number 20220199893
- Publication date Jun 23, 2022
- Vesper Technologies Inc.
- Robert J. Littrell
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
Biometric Authentication Using Voice Accelerometer
- Publication number 20210382972
- Publication date Dec 9, 2021
- Vesper Technologies Inc.
- Robert J. Littrell
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
PIEZOELECTRIC MEMS MICROPHONE
- Publication number 20210273152
- Publication date Sep 2, 2021
- The Regents of the University of Michigan
- Karl Grosh
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
ROBUST MEMS MICROPHONE
- Publication number 20210211809
- Publication date Jul 8, 2021
- Vesper Technologies, Inc.
- Craig Core
- B81 - MICRO-STRUCTURAL TECHNOLOGY
Information Patent Application
Transducer System with Configurable Acoustic Overload Point
- Publication number 20210160623
- Publication date May 27, 2021
- Vesper Technologies, Inc.
- Robert Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Piezoelectric Accelerometer with Wake Function
- Publication number 20200408799
- Publication date Dec 31, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
A PIEZOELECTRIC MEMS DEVICE FOR PRODUCING A SIGNAL INDICATIVE OF DE...
- Publication number 20200344555
- Publication date Oct 29, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Microphone Having a Digital Output Determined at Different Power Co...
- Publication number 20200296530
- Publication date Sep 17, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Piezoelectric MEMS Device with an Adaptive Threshold for Detection...
- Publication number 20200296513
- Publication date Sep 17, 2020
- Vesper Technologies Inc.
- Robert J. Littrell
- H01 - BASIC ELECTRIC ELEMENTS

Robert J. Littrell

Person

Patents Grantslast 30 patents

Biometric authentication using voice accelerometer

Piezoelectric MEMS microphone

Microphone having a digital output determined at different power co...

Acoustic transducer with gap-controlling geometry and method of man...

Piezoelectric MEMS device with an adaptive threshold for detection...

Piezoelectric accelerometer with wake function

Piezoelectric accelerometer with wake function

Staggering of openings in electrodes for crack mitigation

Transducer system with configurable acoustic overload point

Piezoelectric accelerometer with wake function

MEMS process power

Robust MEMS microphone

Piezoelectric MEMS microphone

Piezoelectric MEMS device for producing a signal indicative of dete...

Microphone having a digital output determined at different power co...

Robust MEMS microphone

Piezoelectric MEMS device with an adaptive threshold for detection...

Transducer system with configurable acoustic overload point

Acoustic transducer with gap-controlling geometry and method of man...

MEMS process power

Acoustic sensor with temperature structure

Piezoelectric MEMS microphone

Piezoelectric MEMS microphone

Transducer system with configurable acoustic overload point

Piezoelectric micro-electro-mechanical systems (MEMS) device with a...

Acoustic filtering

Piezoelectric mems device for producing a signal indicative of dete...

Staggering of openings in electrodes for crack mitigation

Acoustic transducer with gap-controlling geometry and method of man...

Piezoelectric MEMS microphone

Patents Applicationslast 30 patents

BONE CONDUCTION MICROPHONE WITH RESONANCE CONTROL BASED ON DETERMIN...

PIEZOELECTRIC VOICE ACCELEROMETER WITH BACK CAVITY AIR PRESSURE COU...

PIEZOELECTRIC MEMS CONTACT DETECTION SYSTEM

VOLTAGE DETECTOR IN DATA COMMUNICATION INTERFACE

PIEZOELECTRIC MEMS CONTACT DETECTION SYSTEM

PIEZOELECTRIC MICROELECTROMECHANICAL SYSTEM (MEMS) SIGNAL PROCESSIN...

LOW NOISE PIEZOELECTRIC SENSORS

MEMS PROCESS POWER

PIEZOELECTRIC MEMS MICROPHONE

MICROPHONE HAVING A DIGITAL OUTPUT DETERMINED AT DIFFERENT POWER CO...

PIEZOELECTRIC MEMS DEVICE FOR PRODUCING A SIGNAL INDICATIVE OF DETE...

PIEZOELECTRIC MICROMACHINED ULTRASONIC TRANSDUCER (PMUT) DESIGN

PIEZOELECTRIC MICROMACHINED ULTRASONIC TRANSDUCER (PMUT) DESIGN

ACOUSTIC TRANSDUCER WITH IMPROVED LOW-FREQUENCY RESPONSE

PIEZOELECTRIC MEMS DEVICE WITH AN ADAPTIVE THRESHOLD FOR DETECTION...

ROBUST MEMS MICROPHONE

Piezoelectric Accelerometer with Wake Function

Piezoelectric Accelerometer with Wake Function

Piezoelectric Accelerometer with Wake Function

TRANSDUCER SYSTEM WITH CONFIGURABLE ACOUSTIC OVERLOAD POINT

Acoustic Transducer with Gap-Controlling Geometry and Method of Man...

MEMS PROCESS POWER

Biometric Authentication Using Voice Accelerometer

PIEZOELECTRIC MEMS MICROPHONE

ROBUST MEMS MICROPHONE

Transducer System with Configurable Acoustic Overload Point

Piezoelectric Accelerometer with Wake Function

A PIEZOELECTRIC MEMS DEVICE FOR PRODUCING A SIGNAL INDICATIVE OF DE...

Microphone Having a Digital Output Determined at Different Power Co...

Piezoelectric MEMS Device with an Adaptive Threshold for Detection...