Robert J Littrell

This inventor holds 43 USPTO granted patents and 10 published patent applications and 6 EPO patents, primarily in Piezoelectric MEMS. Top assignees: Vesper Technologies Inc., Qualcomm Incorporated, Qualcomm Technologies, Inc.. Active years: 2013-2026.

USPTO Granted Patents = 43 (Patent Applications = 10)

% Patents Active = 100.0

EPO Patents = 6 (Patent Applications = 11)

Average Co-Inventor Count = 1.7

ph-index = 10

Forward Citations = 282(Granted Patents)

Location History:

Ann Arbor, MI (US) (2013 - 2019)
Santa Monica, CA (US) (2015 - 2021)
Boston, MA (US) (2018 - 2024)
Belmont, MA (US) (2021 - 2024)

Company Filing History:

16 out of 17

Vesper Technologies Inc.

patents

12 out of 44,749

Qualcomm Incorporated

patents

10 out of 163

Qualcomm Technologies, Inc.

patents

4. 8 out of 3,523

University of Michigan

patents

where one patent can have more than one assignee

Years Active: 2013-2026

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Areas of Expertise:

Piezoelectric

MEMS

Microphone

Accelerometer

Acoustic Transducer

Biometric Authentication

Signal Detection

Voltage Detector

Acoustic Stimulus

Robust Design

Power Consumption

Transducer System

43 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12721040 - Piezoelectric micromachined ultrasonic transducer (PMUT) design (2026-08-25),

2. 12696687 - Piezoelectric accelerometer with wake function (2026-07-28),

3. 12673864 - Acoustic transducer with improved low-frequency response (2026-07-07),

4. 12666198 - Bone conduction microphone with resonance control based on determined audio context information (2026-06-23),

5. 12647722 - Piezoelectric microelectromechanical system (MEMS) signal processing for contact detection (2026-06-02),

6. 12568328 - Piezoelectric voice accelerometer with back cavity air pressure coupling and multiple resonance peaks (2026-03-03),

7. 12445782 - Piezoelectric mems device for producing a signal indicative of detection of an acoustic stimulus (2025-10-14),

8. 12405622 - Voltage detector in data communication interface (2025-09-02),

9. 12216746 - Biometric authentication using voice accelerometer (2025-02-04),

10. 12058939 - Piezoelectric MEMS microphone (2024-08-06),

11. 12010488 - Microphone having a digital output determined at different power consumption levels (2024-06-11),

12. 11950052 - Acoustic transducer with gap-controlling geometry and method of manufacturing an acoustic transducer (2024-04-02),

13. 11930334 - Piezoelectric MEMS device with an adaptive threshold for detection of an acoustic stimulus (2024-03-12),

14. 11899039 - Piezoelectric accelerometer with wake function (2024-02-13),

15. 11892466 - Piezoelectric accelerometer with wake function (2024-02-06),

Title: The Inventor Profile of Robert J Littrell

Introduction: Robert J Littrell is a renowned inventor based in Boston, MA, known for his groundbreaking contributions to various fields.

Latest Patents: Robert J Littrell holds several patents in the areas of technology, healthcare, and consumer products, showcasing his diverse range of innovations.

Career Highlights: With a career spanning over two decades, Robert J Littrell has established himself as a leading figure in the innovation landscape, with a track record of turning ideas into successful inventions.

Collaborations: Throughout his career, Robert J Littrell has collaborated with top research institutions, universities, and companies to bring his inventions to life, demonstrating his ability to work effectively in multidisciplinary teams.

Conclusion: Robert J Littrell's passion for innovation and his relentless pursuit of excellence continue to drive his success as an inventor, making him a key figure in the world of patents and inventions.