For the Inventor, By the Inventor

Enter assignee name

Buffalo, NY, United States of America

Derrick Manufacturing Corporation

USPTO Granted Patents = 39

% Expired Patents = 2.6

EPO Patents = 2

Trademarks = 2

Forward Citations = 1,369

Loading Chart...

Loading Chart...

15 inventors (with patents filed for the assignee):

John J Bakula (22 out of 25 patents)

Keith F Wojciechowski (6 out of 60 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)

Core Competencies:

Vibratory Screening

Screen Assembly

Centrifuging

Slurry Separator

Undulating Screen

Non-Clogging Screen

Vibratory Motor

Fabrication Method

Tensioning Structure

Dewatering Technique

Wear-Reducing Screen

Vibratory Separator

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, based in Buffalo, NY, specializes in the design and manufacture of advanced separation and processing equipment. The company is renowned for its innovative solutions in the fields of mineral processing, wastewater treatment, and industrial filtration. Derrick's commitment to research and development drives its focus on enhancing efficiency and sustainability in various industries, making it a key player in the global market for separation technologies.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

39 Patents

#10 in Buffalo, NY

#541 in New York

#8,814 in US

#17,428 in the World

Buffalo, NY, United States of America

Derrick Manufacturing Corporation

Forward Citations = 1,369

15 inventors:

John J Bakula (22 out of 25 patents)

Keith F Wojciechowski (6 out of 60 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)

Please report any incorrect information to [email protected]

Loading…