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For the Inventor, By the Inventor

Madras, OR, United States of America

Keith Manufacturing Co.

Calculating rank
USPTO Granted Patents = 24

% Expired Patents = 8.3



Trademarks = 10

Forward Citations = 86

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18 inventors (with patents filed for the assignee):

goldMedal Daniel W Jackson (10 out of 12 patents)

silverMedal Randall Mark Foster (8 out of 12 patents)

bronzeMedal John Cook (7 out of 8 patents)

4.  Scott Delamarter (6 out of 6 patents)

5.  Tim Toth (4 out of 4 patents)

6.  Nathan Keeley (4 out of 4 patents)

7.  Kenneth Stout (4 out of 5 patents)

8.  James Prentice Drago (4 out of 5 patents)

9.  Raymond K Foster (3 out of 119 patents)

10.  Victor Matthews (2 out of 2 patents)

11.  Randall Mark Foster, Legal Representative (2 out of 2 patents)

12.  Michael Christopher House (2 out of 2 patents)

13.  Michael Kloepfer (1 out of 26 patents)

14.  Jared Murphy (1 out of 1 patent)

15.  Brandon O'Brien (1 out of 1 patent)


24 patents:

1. 11987449 - Gap filler for reciprocating floor slat conveyor (2024-05-21),
2. 11383934 - Gap filler for reciprocating floor slat conveyor (2022-07-12),
3. 10899549 - Interference fit center head for hydraulic cylinder (2021-01-26),
4. 10611579 - End plug for floor slat (2020-04-07),
5. 10472177 - Extruded chain rail for loading system (2019-11-12),
6. 10351349 - Chain rail unloading system (2019-07-16),
7. 10124962 - Attachment plate for all-steel reciprocating floor slat system (2018-11-13),
8. 10112779 - All-steel reciprocating floor slat system (2018-10-30),
9. 10087011 - Chain rail loading system (2018-10-02),
10. 9969559 - Attachment plate for all-steel reciprocating floor slat system (2018-05-15),
11. 9963298 - All-steel reciprocating floor slat system (2018-05-08),
12. 9278812 - Wear strip assembly for reciprocating conveyor (2016-03-08),
13. 9187257 - V-slat reciprocating slat conveyors (2015-11-17),
14. 9090193 - Moving cleanout for reciprocating conveyor system (2015-07-28),
15. 8708636 - Reciprocating slat for use adjacent to trailer wall (2014-04-29),
Company Overview
Keith Manufacturing Co., based in Madras, Oregon, specializes in the design and production of innovative bulk material handling solutions. The company is renowned for its development of walking floor technology, which enhances the efficiency of loading and unloading materials in various industries, including agriculture and transportation. With a focus on engineering excellence, Keith Manufacturing Co. continues to advance its offerings to meet the evolving needs of its customers in the material handling sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Keith Manufacturing Co. USPTO Patent Assignee Logo
24 Patents

#1 in Madras, OR

#143 in Oregon

#13,895 in US

#26,686 in the World

Madras, OR (US)
Madras, OR, United States of America

Keith Manufacturing Co.

Forward Citations = 86

18 inventors:

goldMedal Daniel W Jackson (10 out of 12 patents)

silverMedal Randall Mark Foster (8 out of 12 patents)

bronzeMedal John Cook (7 out of 8 patents)

4.  Scott Delamarter (6 out of 6 patents)

5.  Tim Toth (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Keith Manufacturing Co.. Retrieved from https://idiyas.com/company/keith-manufacturing-company

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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