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USPTO Patent Rankings Data through Dec 31, 2025
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David L. Epperson — 20 Patents

FLFluke: 18 patents #13 of 518Top 3%
JCJohn Fluke Mfg. Co.: 2 patents #33 of 128Top 30%
Everett, WA: #34 of 1,109 inventorsTop 4%
Washington: #4,680 of 76,902 inventorsTop 7%
Overall (All Time): #214,803 of 4,157,543Top 6%
20 Patents All Time
David L. Epperson has been granted 20 US patents while listed as an inventor at Fluke. The first was granted in 1987 and the most recent in February 2022. David L. Epperson ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list David L. Epperson in Everett, WA, US.

Issued Patents All Time

Showing 1–20 of 20 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11237192 Non-contact current measurement system Ricardo Rodriguez, Ronald Steuer, Jeffrey Worones 2022-02-01
11125783 Wireless Rogowski coil system Matthew Carl-Robert Bannister, Clark N. Huber 2021-09-21
10605832 Sensor subsystems for non-contact voltage measurement devices Ronald Steuer, Jeffrey Worones, Patrick Scott Hunter, Ricardo Rodriguez 2020-03-31
10591515 Non-contact current measurement system Ricardo Rodriguez, Ronald Steuer, Jeffrey Worones 2020-03-17
10473696 Wireless rogowski coil system Matthew Carl-Robert Bannister, Clark N. Huber 2019-11-12
10359494 Proving unit for non-contact voltage measurement systems Ricardo Rodriguez 2019-07-23
10352967 Non-contact electrical parameter measurement systems Ronald Steuer, Peter Radda, Ricardo Rodriguez, Patrick Scott Hunter, Paul A. Ringsrud +4 more 2019-07-16
10254375 Proving unit for voltage measurement systems Ricardo Rodriguez 2019-04-09
10209271 Handheld measurement system with selectable options Glen Howard Vetter, Joseph V. Ferrante 2019-02-19
10095659 Handheld devices, systems, and methods for measuring parameters Luis Alberto Katz, Henricus Koppelmans, Paul H. Heydron 2018-10-09
9933459 Magnetically coupled ground reference probe Jeffrey Worones, Ricardo Rodriguez 2018-04-03
9874547 Wireless combustion/efficiency analyzer 2018-01-23
9766270 Wireless test measurement Paul H. Heydron, Jeetendra Patel 2017-09-19
9739801 Analytical gateway device for measurement devices Thomas Anderson 2017-08-22
9735588 Power source system with multiple electrical outputs John M. Gilbert, Paul A. Ringsrud 2017-08-15
9606146 Wireless rogowski coil system Matthew Carl-Robert Bannister, Clark N. Huber 2017-03-28
9551597 Measurement system with image capture capabilities Glen Howard Vetter 2017-01-24
9377485 Handheld measurement system with selectable options Glen Howard Vetter, Joseph V. Ferrante 2016-06-28
4965421 Particulate spacers for touch sensitive overlay panel applications 1990-10-23 $425,000
4696860 Particulate spacers for inhibiting Newton rings in touch sensitive overlays 1987-09-29 $1,607,000