% Expired Patents = 25.0

CIPO Patents = 2

Trademarks = 1

Forward Citations = 21

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6 inventors (with patents filed for the assignee):

Charlie J Schafer (4 out of 7 patents)

William Littler, Iv (2 out of 3 patents)

Leo E Beebout (2 out of 2 patents)

4. Phil Algreen (1 out of 2 patents)

5. William Littler Iv (1 out of 1 patent)

6. Mark P Gettler (1 out of 1 patent)

7. William Littler (0 patent)

4 patents: Sort by Forward Citations

1. 8342775 - Groundwater control system with purity sensor and method (2013-01-01),

2. 6786234 - Drainage tile flow regulator (2004-09-07),

3. 6715508 - Drainage tile flow regulator (2004-04-06),

4. 6672626 - Corrugated pipe connection stabilizing apparatus (2004-01-06),

Company Overview

Agri Drain Corporation is a leading provider of agricultural drainage solutions in the United States. With over 40 years of experience, the company offers a wide range of products and services to help farmers improve the productivity of their land. Agri Drain's innovative solutions help reduce waterlogging, control erosion, and increase crop yields. The company is committed to delivering high-quality products and exceptional customer service to its clients.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#3 in Adair, IA

#377 in Iowa

#60,671 in US

Adair, IA, United States of America

Agri Drain Corporation

Forward Citations = 21

6 inventors:

Charlie J Schafer (4 out of 7 patents)

William Littler, Iv (2 out of 3 patents)

Leo E Beebout (2 out of 2 patents)

4. Phil Algreen (1 out of 2 patents)

5. William Littler Iv (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Agri Drain Corporation. Retrieved from https://idiyas.com/company/agri-drain

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]

2 patents (CIPO):

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]