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For the Inventor, By the Inventor

Marysville, KS, United States of America

Landoll Corporation

Calculating rank
USPTO Granted Patents = 29

% Expired Patents = 17.2



Trademarks = 7

Forward Citations = 376

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28 inventors (with patents filed for the assignee):

goldMedal Donald R Landoll (23 out of 24 patents)

silverMedal Kyle D Swart (5 out of 5 patents)

bronzeMedal Keith Vacha (5 out of 5 patents)

4.  Loren F Wassenberg (4 out of 5 patents)

5.  David J Kongs (4 out of 4 patents)

6.  Phillip R Landoll (3 out of 3 patents)

7.  Sterling W Gunter (3 out of 3 patents)

8.  Robert D Harlan (3 out of 3 patents)

9.  Alfred R Belknap (3 out of 3 patents)

10.  Christopher Lee Tamm (2 out of 2 patents)

11.  Mel A Beikmann (2 out of 2 patents)

12.  Shannon W Gibson (2 out of 2 patents)

13.  Jeffrey P Germann (2 out of 2 patents)

14.  Hosea M Harris (2 out of 2 patents)

15.  Jeffrey L Keating (2 out of 2 patents)


Core Competencies:
Agricultural Implements
Hydraulic Steering
Welding Systems
Seed Drill
Gooseneck Trailer
Tillage Implement
Multi-Purpose Trailer
Air Spring System
Container Lockdown
Folding Seed Planter
Tilt-Bed Trailer
Depth Control

29 patents:

1. 8960321 - Agricultural implements with float-restricted hinged wings (2015-02-24),
2. 8863882 - Hydraulic steering system for forklift trucks (2014-10-21),
3. 8590632 - Single pass ground driven tiller and seeder apparatus (2013-11-26),
4. 8434657 - Gantry-based welding system and method (2013-05-07),
5. 8292557 - Vehicle transporter (2012-10-23),
6. 8276704 - Hydraulic steering system for forklift trucks (2012-10-02),
7. 8210418 - Multi-station, gantry-based automated welding system (2012-07-03),
8. 8118110 - Agricultural implements with hinged and floating wings (2012-02-21),
9. 7997218 - Soil strip assembly for seed drill row unit (2011-08-16),
10. 7992650 - Air spring down-pressure system for implement (2011-08-09),
11. 6655904 - Method of off-loading a container from a tilt bed trailer (2003-12-02),
12. 6568892 - Container lockdown device (2003-05-27),
13. 6406231 - Container lockdown device (2002-06-18),
14. 6378887 - Gooseneck lift mechanism (2002-04-30),
15. 6224082 - Cam action detachable gooseneck trailer (2001-05-01),
Company Overview
Landoll Corporation, headquartered in Marysville, Kansas, specializes in the design and manufacture of innovative equipment and solutions across various sectors. The company is known for its diverse product lines, including trailers, agricultural equipment, and specialized machinery. With a strong emphasis on engineering and quality, Landoll focuses on delivering reliable and efficient solutions to meet the needs of its customers in the transportation and agricultural industries, contributing to advancements in these fields.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

Landoll Corporation USPTO Patent Assignee Logo
29 Patents

#1 in Marysville, KS

#81 in Kansas

#11,634 in US

#22,581 in the World

Marysville, KS (US)
Marysville, KS, United States of America

Landoll Corporation

Forward Citations = 376

28 inventors:

goldMedal Donald R Landoll (23 out of 24 patents)

silverMedal Kyle D Swart (5 out of 5 patents)

bronzeMedal Keith Vacha (5 out of 5 patents)

4.  Loren F Wassenberg (4 out of 5 patents)

5.  David J Kongs (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Landoll Corporation. Retrieved from https://idiyas.com/company/landoll

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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