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For the Inventor, By the Inventor

Cleveland, OH, United States of America

Keithley Instruments, Inc.


USPTO Granted Patents = 149

% Expired Patents = 9.4



Trademarks = 2

Forward Citations = 882

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86 inventors (with patents filed for the assignee):

goldMedal Wayne C Goeke (45 out of 47 patents)

silverMedal Gregory Sobolewski (29 out of 29 patents)

bronzeMedal James A Niemann (16 out of 17 patents)

4.  John G Banaska (11 out of 11 patents)

5.  William Knauer (11 out of 11 patents)

6.  Martin J Rice (11 out of 11 patents)

7.  George John Polly (10 out of 13 patents)

8.  Brian Patrick Frackelton (9 out of 17 patents)

9.  Michael D Rayman (6 out of 6 patents)

10.  Gregory Roberts, Ii (5 out of 5 patents)

11.  William C Weeman (5 out of 5 patents)

12.  Lawrence J Kizlik (5 out of 5 patents)

13.  Alexander N Pronin (4 out of 5 patents)

14.  Kevin Cawley (4 out of 4 patents)

15.  Matthew Holtz (4 out of 4 patents)


Core Competencies:
Power Supply
Impedance Measurement
Current Source
Analog-to-Digital Converter
Device Testing
Dynamic Characterization
Measurement Calibration
Graphical User Interface
High-Speed Switch
Safety Adapter
Leakage Compensation
Voltage Clamp

149 patents:

1. 12748145 - Low current leakage measurement on a high current unified static and dynamic characterization platform (2026-09-29),
2. 12742819 - Solderless high current, high voltage, high bandwidth test fixture (2026-09-22),
3. 12580488 - High-density multi-channel power supply in a test and measurement instrument (2026-03-17),
4. 12578379 - Unified measurement system for static and dynamic characterization of a device under test (2026-03-17),
5. 12531566 - Combining sampling analog-to-digital converter with continuously integrating analog-to-digital converter (2026-01-20),
6. 12498414 - Unified measurement system for static and dynamic characterization of a device under test (2025-12-16),
7. 12498409 - Correcting for load resistance when making I-V measurements with constant drain voltage on power MOSFETS (2025-12-16),
8. 12363853 - Direct instrument-to-instrument communication without using a system controller (2025-07-15),
9. 12306209 - High current extension for a dual-stage source measure unit (2025-05-20),
10. 12265115 - Digital loop dual-stage source measure unit (2025-04-01),
11. 12241939 - Estimation of unknown electronic load (2025-03-04),
12. 12050243 - Safety container for high power device testing over a range of temperatures (2024-07-30),
13. 11971434 - Power source with error detection (2024-04-30),
14. 11959937 - Triaxial power and control systems and methods (2024-04-16),
15. 11927605 - Interconnect system with high current and low leakage capability (2024-03-12),
Keithley Instruments, Inc., based in Cleveland, OH, specializes in the development and manufacturing of advanced test measurement instruments. The company is recognized for its expertise in power supply solutions, impedance measurement, and current sourcing technologies. Keithley's offerings are integral to device testing and dynamic characterization, ensuring precision in measurement calibration. With a focus on enhancing graphical user interfaces, Keithley supports a wide range of applications across various industries, contributing to innovation in electronic testing and measurement.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Keithley Instruments, Inc.
149 Patents

#18 in Cleveland, OH

#120 in Ohio

#2,638 in US

#5,472 in the World

Cleveland, OH (US)
Cleveland, OH, United States of America

Keithley Instruments, Inc.

Forward Citations = 882

86 inventors:

goldMedal Wayne C Goeke (45 out of 47 patents)

silverMedal Gregory Sobolewski (29 out of 29 patents)

bronzeMedal James A Niemann (16 out of 17 patents)

4.  John G Banaska (11 out of 11 patents)

5.  William Knauer (11 out of 11 patents)

Please report any incorrect information to [email protected]
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