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For the Inventor, By the Inventor

Walla Walla, WA, United States of America

Nelson Irrigation Corporation


USPTO Granted Patents = 167



Trademarks = 10

Forward Citations = 3,462

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41 inventors (with patents filed for the assignee):

goldMedal Craig B Nelson (67 out of 72 patents)

silverMedal George L Sesser (48 out of 55 patents)

bronzeMedal Lee A Perkins (21 out of 21 patents)

4.  Riley D Greenwood (19 out of 19 patents)

5.  Larry P Meyer (18 out of 20 patents)

6.  Chad Daniel Leinweber (15 out of 16 patents)

7.  Barton R Nelson (14 out of 14 patents)

8.  Cliff Paul Ungerecht (12 out of 12 patents)

9.  Michael R Townsend (11 out of 11 patents)

10.  Joseph Daniel Sinden (10 out of 11 patents)

11.  Meade M Neal (9 out of 9 patents)

12.  Mark A Bauman (8 out of 14 patents)

13.  Steven E Crawford (7 out of 7 patents)

14.  Reid A Nelson (7 out of 7 patents)

15.  Paul D Davisson (7 out of 8 patents)


Core Competencies:
Variable Rate Irrigation
Motion Sensor Technology
Multi-Function Pressure Regulation
Automatic Reversible Arc Sprinkler
Wireless Network Irrigation
Quick Connect Coupler
Orbital Sprinkler Design
Flow Control Devices
Agile Irrigation Controller
Sprinkler Assembly Innovations
Pressure Regulator Mechanisms
Deflector Plate Engineering

167 patents:

1. 12366259 - Sprinkler with trellis wire mounting clip (2025-07-22),
2. 12364217 - Variable rate irrigation using motion sensor (2025-07-22),
3. 12186766 - Nozzle and sprinkler for center pivot end (2025-01-07),
4. 12036569 - Automatic reversible arc sprinkler (2024-07-16),
5. 11964293 - Rigid mount orbitor sprinkler (2024-04-23),
6. 11933408 - Multi-function pressure regulation valve (2024-03-19),
7. 11885450 - Quick connect coupler (2024-01-30),
8. 11745207 - Sprinkler with modular components and pop up deflector with lug(s) for rotational engagement (2023-09-05),
9. 11576012 - Wireless network (2023-02-07),
10. 11511290 - Flow control device with drain check (2022-11-29),
11. D966123 - Pressure regulator (2022-10-11),
12. 11408515 - Pressure regulator having an oblique valve seat (2022-08-09),
13. 11376621 - Sprinkler assembly having coiled weight (2022-07-05),
14. 11325147 - Sprinkler with modular components and pop-up deflector (2022-05-10),
15. 11277714 - Wireless network (2022-03-15),
Nelson Irrigation Corporation is a leading provider of irrigation systems for agricultural, industrial, and landscape applications worldwide. With over 100 years of experience, the company offers innovative and reliable sprinklers, valves, control systems, and irrigation solutions. Nelson Irrigation Corporation is committed to improving water efficiency and productivity while reducing environmental impact.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 16 2025

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167 Patents

#1 in Walla Walla, WA

#37 in Washington

#2,302 in US

#4,805 in the World

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Walla Walla, WA, United States of America

Nelson Irrigation Corporation

Forward Citations = 3,462

41 inventors:

goldMedal Craig B Nelson (67 out of 72 patents)

silverMedal George L Sesser (48 out of 55 patents)

bronzeMedal Lee A Perkins (21 out of 21 patents)

4.  Riley D Greenwood (19 out of 19 patents)

5.  Larry P Meyer (18 out of 20 patents)

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