{"@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.patentleaderboard.com/"}, {"@type": "ListItem", "position": 2, "name": "Vesper Technologies", "item": "https://www.patentleaderboard.com/company/vesper-technologies"}, {"@type": "ListItem", "position": 3, "name": "Robert J. Littrell", "item": "https://www.patentleaderboard.com/inventor/fl:ro_ln:littrell-1"}]}

Home › Vesper Technologies › Robert J. Littrell

RL

Robert J. Littrell — 37 Patents

VTVesper Technologies: 16 patents #1 of 10Top 10%

Qualcomm: 16 patents #1,365 of 12,104Top 15%

University of Michigan: 8 patents #201 of 4,352Top 5%

Belmont, MA: #39 of 1,163 inventorsTop 4%

Massachusetts: #2,185 of 88,656 inventorsTop 3%

Overall (All Time): #88,321 of 4,157,543Top 3%

37 Patents All Time

Robert J. Littrell has been granted 37 US patents while listed as an inventor at Vesper Technologies. The first was granted in 2013 and the most recent in October 2025. Robert J. Littrell ranks #88,321 of 4,157,543 US inventors in our database (top 2.1%). Patent records list Robert J. Littrell in Belmont, MA, US.

Patents per Year

Issued Patents All Time

Showing 1–25 of 37 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12445782	Piezoelectric mems device for producing a signal indicative of detection of an acoustic stimulus	Ronald J. Gagnon, Karl Grosh	2025-10-14
12405622	Voltage detector in data communication interface	Bengt Stefan Gustavsson, Louis Dominic Oliveira, Tomer Saraf, Ganesh Kiran, William Wei-Ting KUO	2025-09-02
12216746	Biometric authentication using voice accelerometer	Mathew Crowley	2025-02-04
12058939	Piezoelectric MEMS microphone	Karl Grosh	2024-08-06
12010488	Microphone having a digital output determined at different power consumption levels	—	2024-06-11	$20,939,000
11950052	Acoustic transducer with gap-controlling geometry and method of manufacturing an acoustic transducer	Karl Grosh	2024-04-02	$17,562,000
11930334	Piezoelectric MEMS device with an adaptive threshold for detection of an acoustic stimulus	Michael Carfore, Shuwan Xue	2024-03-12	$19,478,000
11899039	Piezoelectric accelerometer with wake function	—	2024-02-13	$17,908,000
11892466	Piezoelectric accelerometer with wake function	—	2024-02-06	$12,962,000
11871664	Staggering of openings in electrodes for crack mitigation	Karl Grosh	2024-01-09	$10,356,000
11800299	Transducer system with configurable acoustic overload point	Ronald Gagnon	2023-10-24	$8,614,000
11726105	Piezoelectric accelerometer with wake function	—	2023-08-15	$7,580,000
11716906	MEMS process power	—	2023-08-01	$12,988,000
11696078	Robust MEMS microphone	Craig Core, Hamid Basaeri	2023-07-04
11665968	Piezoelectric MEMS microphone	Karl Grosh	2023-05-30
11617048	Microphone having a digital output determined at different power consumption levels	—	2023-03-28	$12,086,000
11617041	Piezoelectric MEMS device for producing a signal indicative of detection of an acoustic stimulus	Ronald Gagnon, Karl Grosh	2023-03-28	$12,086,000
11438706	Robust MEMS microphone	Craig Core, Hamid Basaeri	2022-09-06
11418882	Piezoelectric MEMS device with an adaptive threshold for detection of an acoustic stimulus	Michael Carfore, Shuwan Xue	2022-08-16
11363387	Transducer system with configurable acoustic overload point	Ronald Gagnon	2022-06-14
11259124	Acoustic transducer with gap-controlling geometry and method of manufacturing an acoustic transducer	Karl Grosh	2022-02-22
11217741	MEMS process power	—	2022-01-04
11099078	Acoustic sensor with temperature structure	Yu Hui, Craig Core, Ronald Gagnon	2021-08-24
11088315	Piezoelectric MEMS microphone	Karl Grosh	2021-08-10
10964880	Piezoelectric MEMS microphone	Karl Grosh	2021-03-30