For the Inventor, By the Inventor

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St. Louis, MO, United States of America

Dema Engineering Company

USPTO Granted Patents = 15

% Expired Patents = 13.3

Trademarks = 3

Forward Citations = 284

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13 inventors (with patents filed for the assignee):

Paul E Naslund (6 out of 6 patents)

Michael L Nowicki (6 out of 6 patents)

James Michael Schlueter (4 out of 6 patents)

4. Bruce Weber (2 out of 2 patents)

5. Timothy L Kinser (1 out of 1 patent)

6. Fredrick B Jedlicka (1 out of 1 patent)

7. James Schuleter (1 out of 1 patent)

8. Sone Justin Chan (1 out of 1 patent)

9. Michael Lee Huegerich (1 out of 11 patents)

10. Jeffrey J Smith (1 out of 1 patent)

11. Robert W Haul (1 out of 4 patents)

12. Frederick B Jedlicka (1 out of 6 patents)

13. Lambert Holmes (1 out of 1 patent)

15 patents: Sort by Forward Citations

1. 11426745 - Turbine driven chemical dispenser (2022-08-30),

2. 9808773 - Assembly for controlling eductive dispensing (2017-11-07),

3. 9561481 - Multi-chemical dispensing device (2017-02-07),

4. D682103 - Bottle insert (2013-05-14),

5. 7331488 - Multi-chemical dispensing system (2008-02-19),

6. 6648003 - Backflow preventer (2003-11-18),

7. 6607174 - Dispensing apparatus with in-line actuator (2003-08-19),

8. 6213353 - Solid bowl feeder and equipment tray assembly (2001-04-10),

9. 5797420 - Proportioner (1998-08-25),

10. 5518020 - Proportioner (1996-05-21),

11. 5141016 - Divertor valve (1992-08-25),

12. 5123449 - Selector valve (1992-06-23),

13. 4934651 - Magnetically operated valve and timer assembly (1990-06-19),

14. 4815634 - Vacuum actuated pump (1989-03-28),

15. 4276001 - Fluid pump assembly (1981-06-30),

Dema Engineering Company, based in St. Louis, MO, specializes in the design and manufacture of advanced engineering solutions for various industries. The company focuses on developing innovative products and systems that enhance operational efficiency and safety. Its expertise spans multiple domains, including fluid handling systems, chemical dispensing, and custom engineering solutions. Dema Engineering is committed to delivering high-quality, reliable products that meet the evolving needs of its clients in a competitive market.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

15 Patents

#136 in St. Louis, MO

#301 in Missouri

#21,026 in US

#39,846 in the World

St. Louis, MO, United States of America

Dema Engineering Company

Forward Citations = 284

13 inventors:

Paul E Naslund (6 out of 6 patents)

Michael L Nowicki (6 out of 6 patents)

James Michael Schlueter (4 out of 6 patents)

4. Bruce Weber (2 out of 2 patents)

5. Timothy L Kinser (1 out of 1 patent)

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