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David M. Barrett — 66 Patents

EXExpensify: 30 patents #1 of 6Top 20%

SIScience Applications International: 8 patents #22 of 431Top 6%

GE: 5 patents #6,849 of 36,430Top 20%

WLWang Laboratories: 5 patents #21 of 284Top 8%

EMEmulex Design And Manufacturing: 3 patents #36 of 142Top 30%

TPThe Boots Company Plc: 2 patents #23 of 152Top 20%

TCTetra Co.: 1 patents #9 of 38Top 25%

UEUS Dept of Energy: 1 patents #1,355 of 5,099Top 30%

UNUnknown: 1 patents #29,356 of 83,584Top 40%

MFMayo Foundation: 1 patents #907 of 1,749Top 55%

LTLongyear Tm: 1 patents #36 of 72Top 50%

Google: 1 patents #14,887 of 22,993Top 65%

UFUS Air Force: 1 patents #6,232 of 16,312Top 40%

San Francisco, CA: #289 of 26,999 inventorsTop 2%

California: #4,970 of 386,348 inventorsTop 2%

Overall (All Time): #32,599 of 4,157,543Top 1%

66 Patents All Time

David M. Barrett has been granted 66 US patents while listed as an inventor at Expensify. The first was granted in 1981 and the most recent in September 2025. David M. Barrett ranks #32,599 of 4,157,543 US inventors in our database (top 0.78%). Patent records list David M. Barrett in San Francisco, CA, US.

Patents per Year

Issued Patents All Time

Showing 1–25 of 66 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12406245	Computing system implementing secondary authorizations for prepaid transactions	—	2025-09-02
12375432	Chat management system	Melissa Aaron	2025-07-29
12348931	Voice interactive system	Robert Chen	2025-07-01
12315005	System and method for processing transaction records for users	Kevin Michael Kuchta	2025-05-27
12307376	Training spectral inference neural networks using bilevel optimization	David Benjamin Pfau, Stig Petersen, Ashish Agarwal, Kimberly Stachenfeld	2025-05-20
12190311	Chat abstraction layer for a peer-to-peer transaction service	—	2025-01-07
12020181	Automatic location-based transaction service trigger	Anuradha Muralidharan	2024-06-25	$2,210,000
12002034	Computing system implementing a network transaction service	—	2024-06-04	$2,188,000
11997055	Chat management system	Melissa Aaron	2024-05-28	$2,411,000
11873714	Underground drill rig and systems and methods of using same	Paul Clausen, Shane Fox, Lee Gagne, Steve Corboy, Geoff Moroney	2024-01-16
11829973	Computing system implementing secondary authorizations for prepaid transactions	—	2023-11-28	$3,026,000
11803833	Computing system implementing a network transaction service	—	2023-10-31	$3,117,000
11663654	System and method for processing transaction records for users	Kevin Michael Kuchta	2023-05-30	$6,269,000
11658450	Wavelength flexibility through variable-period poling of a compact cylindrical optical fiber assembly	Christian Keyser, Trevor Courtney, John P. Timler	2023-05-23
11630150	IC device authentication using energy characterization	—	2023-04-18	$15,644,000
11627417	Voice interactive system	Robert Chen	2023-04-11	$8,600,000
11516153	Computer system providing a chat engine	Melissa Aaron	2022-11-29	$11,176,000
11361304	Computing system implementing a network transaction service	—	2022-06-14	$24,817,000
11263611	Computing system implementing secondary authorizations for prepaid transactions	—	2022-03-01	$27,238,000
11210649	Computing system implementing a network transaction service	—	2021-12-28	$58,380,000
11067625	IC device authentication using energy characterization	—	2021-07-20	$33,037,000
11030550	Computing system implementing reservation monitoring and shared fund transaction processing	Anuradha Muralidharan	2021-06-08
10929836	Computing system implementing a network transaction service	—	2021-02-23
10699260	System, computer readable medium, and method for authorizing purchase using on-demand prepaid card	—	2020-06-30
10684324	IC device authentication using energy characterization	—	2020-06-16	$80,250,000