For the Inventor, By the Inventor

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Wauwatosa, WI, United States of America

Briggs & Stratton, LLC

USPTO Granted Patents = 779

EPO Patents = 37

Trademarks = 105

Forward Citations = 8,204

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510 inventors (with patents filed for the assignee):

Robert J Koenen (66 out of 66 patents)

Gary J Gracyalny (44 out of 44 patents)

Richard J Gilpatrick (37 out of 39 patents)

4. John D Santi (32 out of 33 patents)

5. Jeffrey Michael Zeiler (31 out of 142 patents)

6. David W Procknow (30 out of 30 patents)

7. Jacob Schmalz (28 out of 28 patents)

8. Richard A Dykstra (28 out of 29 patents)

9. Robert K Mitchell (28 out of 30 patents)

10. Jason James Raasch (25 out of 27 patents)

11. Paul A Tharman (24 out of 25 patents)

12. James F Marshall (23 out of 26 patents)

13. Jason Andrew Hansen (23 out of 24 patents)

14. Steven J Weber (21 out of 21 patents)

15. Carl T Tiefenthaler (21 out of 21 patents)

Core Competencies:

Oil Filter

Battery Assembly

Outdoor Power Equipment

Small Air-Cooled Engine

Robotic Lawn Mower

Zero Turn Radius Mower

Hybrid Light Tower

Cooling System

Ignition Coil

Modular Battery Assembly

Mower Deck

Engine Calibration

779 patents: Sort by Forward Citations

1. 12494516 - Cell module assemblies battery pack (2025-12-09),

2. D1103333 - Oil filter (2025-11-25),

3. 12482869 - Equipment management via mesh network (2025-11-25),

4. 12467659 - Adjustable duct mechanism for heating equipment (2025-11-11),

5. D1100829 - Motor (2025-11-04),

6. D1100828 - Motor (2025-11-04),

7. 12444961 - Battery assembly for battery powered equipment (2025-10-14),

8. 12419228 - Deflector assembly for outdoor power equipment (2025-09-23),

9. 12418053 - Battery system with parallel joining protection (2025-09-16),

10. 12416252 - Small air-cooled engine assembly with dry sump lubrication system (2025-09-16),

11. 12414503 - Single height adjustment and control assembly for walk-behind outdoor power equipment (2025-09-16),

12. 12370849 - Outdoor power equipment suspension system (2025-07-29),

13. 12351044 - Battery system and related management system (2025-07-08),

14. 12349621 - Zero turn radius mower with cutting blade control (2025-07-08),

15. 12329062 - Lawn mower with pivotal rocker arm assembly (2025-06-17),

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

779 Patents

#2 in Wauwatosa, WI

#10 in Wisconsin

#627 in US

#1,244 in the World

Wauwatosa, WI, United States of America

Briggs & Stratton, LLC

Forward Citations = 8,204

510 inventors:

Robert J Koenen (66 out of 66 patents)

Gary J Gracyalny (44 out of 44 patents)

Richard J Gilpatrick (37 out of 39 patents)

4. John D Santi (32 out of 33 patents)

5. Jeffrey Michael Zeiler (31 out of 142 patents)

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