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Saint Paul, MN, United States of America

American Hoist & Derrick Company

USPTO Granted Patents = 26

Trademarks = 16

Forward Citations = 406

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21 inventors (with patents filed for the assignee):

Edward J Crook (5 out of 13 patents)

Wallace M Thompson (4 out of 5 patents)

John T Hornagold (4 out of 5 patents)

4. Pierre Cornelius Delago (3 out of 9 patents)

5. Gary H Beckley (2 out of 4 patents)

6. Ram N Rathi (2 out of 2 patents)

7. William D Beeland (2 out of 2 patents)

8. Charles Ronald Garrett (2 out of 2 patents)

9. Zekeriya Yargici (2 out of 3 patents)

10. Emerl R Carpenter (1 out of 1 patent)

11. Louis F Ray (1 out of 11 patents)

12. Claudius R Strickland, Jr (1 out of 1 patent)

13. James B Shahan (1 out of 1 patent)

14. LeRoy G Krupke (1 out of 1 patent)

15. Christoph A Landolt (1 out of 1 patent)

26 patents: Sort by Forward Citations

1. 4579234 - Self-erecting mobile crane (1986-04-01),

2. 4568232 - Barge mounted horizontal boom bulk unloader (1986-02-04),

3. 4478340 - Swing bearing quick removal system (1984-10-23),

4. 4454952 - Means of removably mounting an outrigger (1984-06-19),

5. 4448396 - Heave motion compensation apparatus (1984-05-15),

6. 4446807 - Mooring apparatus for floating vessels (1984-05-08),

7. 4313691 - Lubrication and bearing structure for concentric, independently rotating (1982-02-02),

8. 4305627 - Bearing housing and lubrication structure for concentric rotating members (1981-12-15),

9. 4287823 - Slush pulp baler (1981-09-08),

10. 4257201 - Self-centering telescoping beams (1981-03-24),

11. 4215463 - Method of field forming a loop splice for wire rope (1980-08-05),

12. 4174132 - Multiple position hook assembly (1979-11-13),

13. 4148531 - Self-aligning slide pads for telescopic boom (1979-04-10),

14. 4148253 - Vertical closed chamber baler (1979-04-10),

15. 4109747 - Steering mechanism (1978-08-29),

American Hoist & Derrick Company is a renowned manufacturer of cranes and other lifting equipment. With a rich history of over 100 years, the company has been providing innovative and reliable solutions for various industries, including construction, oil and gas, mining, and more. Their products are known for their exceptional quality, durability, and advanced technologies, ensuring safe and efficient lifting operations. Visit their website to explore their extensive range of cranes, hoists, and related services.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

26 Patents

#58 in Saint Paul, MN

#369 in Minnesota

#12,431 in US

#24,067 in the World

Saint Paul, MN, United States of America

American Hoist & Derrick Company

Forward Citations = 406

21 inventors:

Edward J Crook (5 out of 13 patents)

Wallace M Thompson (4 out of 5 patents)

John T Hornagold (4 out of 5 patents)

4. Pierre Cornelius Delago (3 out of 9 patents)

5. Gary H Beckley (2 out of 4 patents)

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