For the Inventor, By the Inventor

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Eldridge, IA, United States of America

Krl Holding Company, Inc.

USPTO Granted Patents = 9

CIPO Patents = 4

Forward Citations = 61

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14 inventors (with patents filed for the assignee):

Karl R Lewis (5 out of 10 patents)

Douglas Dean Olson (4 out of 10 patents)

Joe Beitelspacher (3 out of 5 patents)

4. James Arend Seabold Bargren (2 out of 5 patents)

5. Neal David Hohl (2 out of 5 patents)

6. John J Smith (1 out of 19 patents)

7. Michael Nawrocki (1 out of 1 patent)

8. Michael Neff (1 out of 1 patent)

9. Jacob A Schafer (1 out of 4 patents)

10. Charles Olmsted (1 out of 1 patent)

11. Jason Rice (1 out of 1 patent)

12. Joseph Beitelspacher (1 out of 1 patent)

13. Michael Anthony Conger (1 out of 1 patent)

14. Konstantin Konev (1 out of 1 patent)

9 patents: Sort by Forward Citations

1. 12352518 - Gas operating system for low energy ammunition (2025-07-08),

2. 12025389 - Two-stage, drop-in trigger assembly (2024-07-02),

3. 10837728 - Two-stage, drop-in trigger assembly (2020-11-17),

4. 10488134 - Two-stage, drop-in trigger assembly (2019-11-26),

5. 10197353 - Receiver with an ambidextrous bolt stop (2019-02-05),

6. 9885529 - Contoured cam pin for a rotating bolt (2018-02-06),

7. 9217615 - Firearm assembly with upper receiver incorporating an integral upper rail (2015-12-22),

8. 9151556 - Firearm bolt (2015-10-06),

9. D733247 - Adjustable butt stock (2015-06-30),

Krl Holding Company, Inc. is a leading international holdings company with diverse interests in technology, real estate, and hospitality sectors. With a focus on innovation and sustainable growth, Krl Holding Company, Inc. is committed to delivering value to its shareholders and stakeholders. Visit our website for more information.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

9 Patents

#1 in Eldridge, IA

#201 in Iowa

#31,581 in US

Eldridge, IA, United States of America

Krl Holding Company, Inc.

Forward Citations = 61

14 inventors:

Karl R Lewis (5 out of 10 patents)

Douglas Dean Olson (4 out of 10 patents)

Joe Beitelspacher (3 out of 5 patents)

4. James Arend Seabold Bargren (2 out of 5 patents)

5. Neal David Hohl (2 out of 5 patents)

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