For the Inventor, By the Inventor

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Buffalo, NY, United States of America

Derrick Manufacturing Corporation

USPTO Granted Patents = 39

EPO Patents = 2

Trademarks = 3

Forward Citations = 1,365

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15 inventors (with patents filed for the assignee):

John J Bakula (22 out of 25 patents)

Keith F Wojciechowski (6 out of 59 patents)

William W Derrick (5 out of 5 patents)

4. H William Derrick, Jr (4 out of 4 patents)

5. James A Mooney (3 out of 4 patents)

6. Robert G Derrick (3 out of 3 patents)

7. James W Derrick (3 out of 3 patents)

8. Raymond M Kirsch (2 out of 6 patents)

9. Thomas M Fallon (2 out of 3 patents)

10. Scott Michael Kroon (1 out of 2 patents)

11. Christopher P Kelley (1 out of 1 patent)

12. John A Tanner (1 out of 1 patent)

13. Ronald J Schiller (1 out of 1 patent)

14. Robert E Ennis (1 out of 3 patents)

15. L Charles Matsch (1 out of 1 patent)

39 patents: Sort by Forward Citations

1. 7025210 - Method and apparatus for attenuating sound from vibratory screening machines (2006-04-11),

2. 6971982 - Apparatus for centrifuging a slurry (2005-12-06),

3. 6905452 - Apparatus for centrifuging a slurry (2005-06-14),

4. 6820748 - Vibratory screening machine with stacked and staggered screening units (2004-11-23),

5. 6669027 - Vibratory screening machine and vibratory screen and screen tensioning structure (2003-12-30),

6. 6580189 - Vibratory motor having a self-contained continuous bearing lubrication system (2003-06-17),

7. 6564947 - Method of screening material utilizing a plurality of undulating screen assemblies (2003-05-20),

8. 6431366 - Vibratory screening machine with stacked and staggered screening units (2002-08-13),

9. 6340089 - Method of fabricating undulating screen for vibratory screening machine (2002-01-22),

10. 6250476 - Municipal waste separator (2001-06-26),

11. 6220448 - Screen assembly for vibratory screening machine (2001-04-24),

12. 6161700 - Vibratory screening screen and method of fabrication thereof (2000-12-19),

13. 6153041 - Screen assembly for vibratory screening machine and method of (2000-11-28),

14. 6053332 - Method of fabricating undulating screen for vibratory screening machine (2000-04-25),

15. 6000556 - Screen assembly for vibratory screening machine (1999-12-14),

Derrick Manufacturing Corporation is a leading provider of high-quality industrial equipment. With over 50 years of experience, we specialize in designing and manufacturing innovative solutions for various industries including mining, oil and gas, construction, and more. Our products are known for their exceptional durability, reliability, and advanced technology. Visit our website to explore our wide range of equipment and learn more about how we can fulfill your industrial needs.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

39 Patents

#10 in Buffalo, NY

#493 in New York

#8,536 in US

#16,933 in the World

Buffalo, NY, United States of America

Derrick Manufacturing Corporation

Forward Citations = 1,365

15 inventors:

John J Bakula (22 out of 25 patents)

Keith F Wojciechowski (6 out of 59 patents)

William W Derrick (5 out of 5 patents)

4. H William Derrick, Jr (4 out of 4 patents)

5. James A Mooney (3 out of 4 patents)

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