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For the Inventor, By the Inventor

Minneapolis, MN, United States of America

Donaldson Comapny, Inc.


USPTO Granted Patents = 1,405



Trademarks = 85

Forward Citations = 45,798

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747 inventors (with patents filed for the assignee):

goldMedal Steven Scott Gieseke (127 out of 127 patents)

silverMedal Benny K Nelson (86 out of 87 patents)

bronzeMedal Wayne M Wagner (79 out of 81 patents)

4.  Daniel Eric Adamek (74 out of 75 patents)

5.  Gary Ray Gillingham (69 out of 69 patents)

6.  John R Hacker (68 out of 71 patents)

7.  Thomas Donald Raether (65 out of 66 patents)

8.  Richard J Osendorf (62 out of 62 patents)

9.  Wayne R W Bishop (54 out of 54 patents)

10.  Kevin J Schrage (53 out of 53 patents)

11.  Paul R Coulonvaux (48 out of 48 patents)

12.  Andrew J Dallas (47 out of 49 patents)

13.  Gregory L Reichter (46 out of 46 patents)

14.  Thomas John Lundgren (45 out of 45 patents)

15.  Thomas G Miller (44 out of 44 patents)


Core Competencies:
Air Filtration
Filter Cartridge
Hydrodynamic Separators
Exhaust Aftertreatment
Affinity Membrane
Nonwoven Filtration Media
Fluid Filtration
Air Cleaner Assemblies
Pleated Filter Element
Porous PTFE Membrane
Liquid Filtration Media
Filtration Systems

1,405 patents:

1. 12512129 - Gas replenishment component for an enclosure (2025-12-30),
2. D1103218 - Filter cartridge (2025-11-25),
3. 12480675 - Air filtration monitoring system with learning features (2025-11-25),
4. 12478899 - Maintenance of hydrodynamic separators (2025-11-25),
5. 12473851 - Dosing and mixing assemblies for exhaust aftertreatment system (2025-11-18),
6. 12465881 - Air filter systems, filter bag assemblies, filter bags and methods (2025-11-11),
7. 12465066 - System and method for filtering beverages (2025-11-11),
8. 12447431 - Air cleaner assemblies and methods of use (2025-10-21),
9. 12447430 - Assemblies; components and filter features thereof; and, methods of use and assembly (2025-10-21),
10. 12440930 - Fume extractor (2025-10-14),
11. 12434201 - Affinity membrane and method of preparation (2025-10-07),
12. 12434181 - Air cleaner and filtration assemblies (2025-10-07),
13. 12434180 - Nonwoven filtration media including microfibrillated cellulose fibers (2025-10-07),
14. 12434178 - Filtration devices and associated filter element (2025-10-07),
15. 12427468 - Air filter element and air filter comprising same (2025-09-30),
Donaldson Company, Inc. is a global leader in providing filtration solutions for a wide range of industries. With a history dating back to 1915, the company manufactures innovative filtration systems and replacement parts that improve air quality and equipment performance. Donaldson's offerings include air filters, liquid filters, gas filtration systems, and more. Serving diverse markets such as transportation, agriculture, industrial, and healthcare, Donaldson is committed to delivering reliable and efficient filtration solutions to its customers worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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1,405 Patents

#4 in Minneapolis, MN

#12 in Minnesota

#346 in US

#684 in the World

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Minneapolis, MN, United States of America

Donaldson Comapny, Inc.

Forward Citations = 45,798

747 inventors:

goldMedal Steven Scott Gieseke (127 out of 127 patents)

silverMedal Benny K Nelson (86 out of 87 patents)

bronzeMedal Wayne M Wagner (79 out of 81 patents)

4.  Daniel Eric Adamek (74 out of 75 patents)

5.  Gary Ray Gillingham (69 out of 69 patents)

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